         "url": "http://en.wikipedia.org/wiki/New_York_City",
            "city": "New York City"
        }
    }];

    // Add features to the map
    map.featureLayer.setGeoJSON(geoJson);

    // Cycle through markers once geoJson is ready.
    // Add custom popups to each using our custom feature properties
    map.featureLayer.eachLayer(function(marker) {

        var feature = marker.feature;

        // Create custom popup content
        var popupContent =  '<a target="_blank" class="popup" href="' +