     features: [{
            type: 'Feature',
            properties: {
                title: 'Washington, D.C.',
                'marker-color': '#f00',
                'marker-size': 'large',
                url: 'http://en.wikipedia.org/wiki/Washington,_D.C.'
            },
            geometry: {
                type: 'Point',
                coordinates: [-77.03201, 38.90065]
            }
        },
        {
            type: 'Feature',
            properties: {
                title: 'Baltimore, M