var VisitSchema = mongoose.Schema({
    user_id: { type: Schema.Types.ObjectId, ref: 'User' },
    name: String,
    city: {
        name: String,
        reference: String,
        location: [Number]
    },
    photos: [{
        image_url: String,
        description: String
    }]
});

{
    "_id" : ObjectId("5449eceeea5281056768aef8"),
    "user_id" : ObjectId("540603dd797be100008b4340"),
    "name" : "Test",
    "photos" : [
        {
            "image_url" : "testURL",
            "description" : "testDescription",
            "_id" : ObjectId("5449eceeea5281056768aefb")
        }
    ],
    "city" : {
        "name" : "New York, NY, United States",
        "reference" : "CoQBdAAAAFfbZuaWptFtAkhGaO87UVSaXbyYwtTY_xX-pH84mS6QO2ypLr15znsCnYvaZ_N8CvwCBAr4y34PSQqyTUwxa5qbUKBK0yHnUFgTLKPQMFKqyQ8xd4vcDPNXf5XSxlpsXKKPYnU0AJZEVVxXLJ_6IBiUay9emFvNXPiYb7kT04NjEhB8fK-jKIZHJ5Bfz_mfyk2MGhTJwOPU68NQiV7RlAdb0Gca1bg0ew",
        "location" : [
            -74.0059413,
            40.7127837
        ]
    },
    "__v" : 0
}