Ejemplo de búsqueda de locales a 800m a la redonda desde iZ3
https://api.foursquare.com/v2/venues/search?intent=browse&ll=41.338559,1.995075&radius=800

https://api.foursquare.com/v2/venues/search?intent=browse&ll=41.338559,1.995075&radius=800&oauth_token=QU3ZFWWRPUFJEZCIIKAJLUIDFGD0FMHKDMKY4N1TZIGOJKUG&v=20111219

{

    meta: {
        code: 200
    }
    notifications: [
        {
            type: "notificationTray"
            item: {
                unreadCount: 0
            }
        }
    ]
    response: {
        venues: [
            {
                id: "4db562e66e8179a9138dfa0a"
                name: "Sant Climent"
                contact: { }
                location: {
                    isFuzzed: true
                    lat: 41.32870971535809
                    lng: 2.0028360421453577
                    distance: 1273
                    city: "Sant Climent de Llobregat"
                    state: "CT"
                }
                categories: [
                    {
                        id: "4bf58dd8d48988d103941735"
                        name: "Home"
                        pluralName: "Homes"
                        shortName: "Home"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/building/home_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 12
                    usersCount: 5
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4dd2782d8877261f70fc1177"
                name: "Cal Refilat"
                contact: { }
                location: {
                    address: "Plaça de la Vila, 3"
                    lat: 41.337624
                    lng: 1.996681
                    distance: 169
                    postalCode: "08849"
                    city: "Sant Climent de Llobregat"
                    state: "Catalonia"
                }
                categories: [ ]
                verified: false
                stats: {
                    checkinsCount: 6
                    usersCount: 5
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4e20803422717a5245c0fee0"
                name: "Hortet del baix"
                contact: { }
                location: {
                    lat: 41.331313
                    lng: 2.002542
                    distance: 1019
                    city: "Sant Climent de Llobregat"
                    state: "Cataluña"
                }
                categories: [
                    {
                        id: "4d4b7105d754a06374d81259"
                        name: "Food"
                        pluralName: "Food"
                        shortName: "Food"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/food/default_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 5
                    usersCount: 3
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4ed7acb2775b4437aa86f0af"
                name: "Cal Mari"
                contact: { }
                location: {
                    isFuzzed: true
                    lat: 41.33890468775233
                    lng: 1.9930466339203077
                    distance: 173
                }
                categories: [
                    {
                        id: "4bf58dd8d48988d103941735"
                        name: "Home"
                        pluralName: "Homes"
                        shortName: "Home"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/building/home_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 1
                    usersCount: 1
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4ee8f1d60e019eee5ea4d29b"
                name: "iZ3 / iZ3Solutions"
                contact: {
                    twitter: "iz3solutions"
                }
                location: {
                    address: "Costafustera 10"
                    lat: 41.338416
                    lng: 1.995068
                    distance: 15
                    postalCode: "08849"
                    state: "Barcelona"
                }
                categories: [
                    {
                        id: "4bf58dd8d48988d125941735"
                        name: "Tech Startup"
                        pluralName: "Tech Startups"
                        shortName: "Tech Startup"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/shops/technology_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 1
                    usersCount: 1
                    tipCount: 1
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4eeee71fd3e3246bdcf4a02b"
                name: "Troqueles J. A."
                contact: { }
                location: {
                    address: "Cami De Can Bori"
                    lat: 41.331421
                    lng: 2.001907
                    distance: 978
                    city: "Sant Climent De Llobregat"
                }
                categories: [
                    {
                        id: "4eb1bea83b7b6f98df247e06"
                        name: "Factory"
                        pluralName: "Factories"
                        shortName: "Factory"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/building/default_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 1
                    usersCount: 1
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4ebfb3bbd5fb50d70f44fb65"
                name: "Grinderhaus"
                contact: { }
                location: {
                    isFuzzed: true
                    lat: 41.33890468775233
                    lng: 1.9930466339203077
                    distance: 173
                    city: "St. Climent de Llobregat"
                }
                categories: [
                    {
                        id: "4bf58dd8d48988d103941735"
                        name: "Home"
                        pluralName: "Homes"
                        shortName: "Home"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/building/home_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 1
                    usersCount: 1
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4e2ec0fde4cdb5a70d60f818"
                name: "Restaurant El Racó"
                contact: { }
                location: {
                    lat: 41.336729
                    lng: 1.996037
                    distance: 219
                    city: "Sant Climent de Llobregat"
                    state: "Cataluña"
                }
                categories: [
                    {
                        id: "4bf58dd8d48988d1c4941735"
                        name: "Restaurant"
                        pluralName: "Restaurants"
                        shortName: "Other - Food"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/food/default_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 2
                    usersCount: 2
                    tipCount: 1
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4cdeb5403644a093ffb64d9f"
                name: "Sant Climent"
                contact: { }
                location: {
                    address: "Carrer Majir"
                    lat: 41.33754
                    lng: 1.996596
                    distance: 170
                    city: "Sant Climent de Llobregat"
                    state: "CT"
                }
                categories: [
                    {
                        id: "4bf58dd8d48988d164941735"
                        name: "Plaza"
                        pluralName: "Plazas"
                        shortName: "Plaza / Square"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/parks_outdoors/default_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 18
                    usersCount: 14
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4e18b3fc6284ea7246fb7afc"
                name: "El Petit Bonet"
                contact: { }
                location: {
                    lat: 41.334093
                    lng: 1.998152
                    distance: 559
                }
                categories: [
                    {
                        id: "4bf58dd8d48988d1c4941735"
                        name: "Restaurant"
                        pluralName: "Restaurants"
                        shortName: "Other - Food"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/food/default_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 3
                    usersCount: 3
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4e909d869a52db7dba57cd27"
                name: "El Raconet de Lola"
                contact: { }
                location: {
                    lat: 41.337508
                    lng: 1.99542
                    distance: 120
                    city: "Sant Climent de Llobregat"
                    state: "Cataluña"
                }
                categories: [
                    {
                        id: "4bf58dd8d48988d1c7941735"
                        name: "Snack Place"
                        pluralName: "Snack Places"
                        shortName: "Snacks"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/food/default_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 1
                    usersCount: 1
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4de5107ec65b7a3e215865c6"
                name: "En Casa"
                contact: { }
                location: {
                    isFuzzed: true
                    lat: 41.33890468775233
                    lng: 1.9930466339203077
                    distance: 173
                    city: "Sant Climent de Llobregat"
                    state: "Cataluña"
                }
                categories: [
                    {
                        id: "4bf58dd8d48988d103941735"
                        name: "Home"
                        pluralName: "Homes"
                        shortName: "Home"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/building/home_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 19
                    usersCount: 3
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4e664301ae60e9edf75b5881"
                name: "Placa Francesc Macià"
                contact: { }
                location: {
                    address: "Placa Francesc Macià"
                    crossStreet: "Calle de Moll"
                    lat: 41.337355
                    lng: 1.996209
                    distance: 164
                    city: "Sant Climent de Llobregat"
                    state: "Catalonia"
                }
                categories: [
                    {
                        id: "4bf58dd8d48988d164941735"
                        name: "Plaza"
                        pluralName: "Plazas"
                        shortName: "Plaza / Square"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/parks_outdoors/default_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 1
                    usersCount: 1
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4c3ef897db3b1b8d42156695"
                name: "Nova Passarel•la De Sant Climent"
                contact: { }
                location: {
                    address: "Pau Casals"
                    crossStreet: "Camí de la Camariga"
                    lat: 41.33758
                    lng: 1.994024
                    distance: 139
                    city: "Sant Climent de Llobregat"
                    state: "CT"
                }
                categories: [
                    {
                        id: "4bf58dd8d48988d1df941735"
                        name: "Bridge"
                        pluralName: "Bridges"
                        shortName: "Bridge"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/parks_outdoors/default_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 17
                    usersCount: 4
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4e2d1cfbd164223a69930b5d"
                name: "Ajuntament Sant Climent de Llobregat"
                contact: { }
                location: {
                    address: "Plaça de la Vila, 1"
                    lat: 41.337448
                    lng: 1.9958
                    distance: 137
                    city: "Sant Climent de Llobregat"
                    state: "Cataluña"
                }
                categories: [
                    {
                        id: "4bf58dd8d48988d129941735"
                        name: "City Hall"
                        pluralName: "City Halls"
                        shortName: "City Hall"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/building/default_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 6
                    usersCount: 2
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4dcefac0c65bdac713701770"
                name: "La Cirera Cocteleria"
                contact: { }
                location: {
                    lat: 41.333956
                    lng: 1.999193
                    distance: 617
                    city: "Sant Climent de Llobregat"
                    state: "CT"
                }
                categories: [
                    {
                        id: "4bf58dd8d48988d11e941735"
                        name: "Cocktail Bar"
                        pluralName: "Cocktails Bars"
                        shortName: "Cocktail"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/nightlife/cocktails_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 1
                    usersCount: 1
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4edcf826d3e346be375f891c"
                name: "iZ3"
                contact: { }
                location: {
                    lat: 41.338436
                    lng: 1.995268
                    distance: 21
                }
                categories: [ ]
                verified: false
                stats: {
                    checkinsCount: 0
                    usersCount: 0
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4edcf84c722e1da3054d778c"
                name: "iZ3"
                contact: { }
                location: {
                    lat: 41.338436
                    lng: 1.995268
                    distance: 21
                }
                categories: [ ]
                verified: false
                stats: {
                    checkinsCount: 0
                    usersCount: 0
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4ee8f14829c284f4bb49ea3b"
                name: "iZ3 / iZ3Solutions"
                contact: {
                    twitter: "iz3solutions"
                }
                location: {
                    address: "Costafustera 10"
                    lat: 41.338429
                    lng: 1.995108
                    distance: 14
                    postalCode: "08849"
                    city: "Sant Climent del Llobregat"
                    state: "Barcelona"
                }
                categories: [
                    {
                        id: "4bf58dd8d48988d125941735"
                        name: "Tech Startup"
                        pluralName: "Tech Startups"
                        shortName: "Tech Startup"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/shops/technology_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 0
                    usersCount: 0
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4eeb6d88f9abe756b91b29ca"
                name: "Casal De Cultura"
                contact: { }
                location: {
                    lat: 41.338073027486345
                    lng: 1.9945784765592025
                    distance: 68
                }
                categories: [
                    {
                        id: "4bf58dd8d48988d135941735"
                        name: "Indie or Off Broadway Theater"
                        pluralName: "Indie or Off Broadway Theaters"
                        shortName: "Indie / Off Broadway"
                        icon: {
                            prefix: "https://foursquare.com/img/categories/arts_entertainment/default_"
                            sizes: [
                                32
                                44
                                64
                                88
                                256
                            ]
                            name: ".png"
                        }
                        primary: true
                    }
                ]
                verified: false
                stats: {
                    checkinsCount: 1
                    usersCount: 1
                    tipCount: 0
                }
                hereNow: {
                    count: 0
                }
            }
            {
                id: "4edde0479911a3e79130b7f1"
                name: "Ca La Marieta"
                contact: { }
                location: {
                    lat: 41.33880487982989
                    lng: 1.9958498743808861
                    distance: 70
                }
                categories: [ ]
                verified: false
                stats: {
                    checkinsCount: 1
                    usersCount: 1
                    tipCount: 1
                }
                hereNow: {
                    count: 0
                }
            }
        ]
    }

}