source: mapbox.com/mapbox.js/assets/data/eastcoast_cities.geojson

eastcoast_cities.geojson

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {
        "marker-color": "#f76565",
        "title": "DC"
      },
      "geometry": {
        "type": "Point",
        "coordinates": [
          -77.038879394531,
          38.89530825492
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {
        "marker-color": "#f76565",
        "title": "Baltimore"
      },
      "geometry": {
        "type": "Point",
        "coordinates": [
          -76.632385253906,
          39.302424560415
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {
        "marker-color": "#f76565",
        "title": "Philadelphia"
      },
      "geometry": {
        "type": "Point",
        "coordinates": [
          -75.140991210938,
          39.962385549176
        ]
      }
    }
  ]
}