<http://schema.org/thumbnailUrl>
<https://drscdn.500px.org/photo/18657847/w%3D160_h%3D160_s%3D1/1e06a7d586c2d912bd7af1873e0c34d8>
<https://marketplace.500px.com/photos/18657847/heavenly-body-by-thomas-hudson>