<http://schema.org/thumbnailUrl>
<https://drscdn.500px.org/photo/17024233/w%3D160_h%3D160_s%3D1/d7c0276b922b6a1c8d40aeea99dd60a7>
<https://marketplace.500px.com/photos/17024233/south-inch-pond-perth-scotland-by-kenny-mclean>