gistfile1.js

var my_url = "https://api.500px.com/v1/photos?feature=user&username=bzwemmer&consumer_key=ByGjMRRao3aAozGsq6HuxZmJfA6ufWzNL32VPplp";
var json = (function() {
    var json = null;
    $.ajax({
        'async': false,
        'global': false,
        'url': my_url,
        'dataType': "json",
        'success': function (data){
            json = data;
            // window.json.photos[0].latitude - Path to latitude
            GeoJSON.parse(json, {Point: ['photos[0].latitude', 'photos[0].longitude'], include: ['name']}, function(geojson){
		          console.log(JSON.stringify(geojson));
          });
        }
    });
    return json;
})();