example.geojson

{
    "type": "FeatureCollection",
    "features": [{ "type": "Feature",
        "geometry": {
            "type": "Point",
            "coordinates": [0, 0]
        },
        "properties": {
            "title": "A title",
            "description": "A description <b>here</b>",
            "photo": "<a href='https://d1cuyjsrcm0gby.cloudfront.net/6TK5ZnAXJIVbqz6AJfsTkA/thumb-2048.jpg'><img width='150px' src='https://d1cuyjsrcm0gby.cloudfront.net/6TK5ZnAXJIVbqz6AJfsTkA/thumb-320.jpg'/></a>",
            "comment-01": "A comment with <a href='http://pt.wikipedia.org/wiki/HTML'>HTML</a>",            
            "marker-size": "medium",
            "marker-symbol": "bus",
            "marker-color": "#fff",
            "stroke": "#555555",
            "stroke-opacity": 1.0,
            "stroke-width": 2,
            "fill": "#555555",
            "fill-opacity": 0.5
        }
    }]
}