<http://schema.org/thumbnailUrl>
<https://drscdn.500px.org/photo/11038041/w%3D160_h%3D160_s%3D1/ef147b965887256ca0c0c0adb17a6d72>
<https://marketplace.500px.com/photos/11038041/bay-area-view-by-jherell-rabanal>