<http://schema.org/keywords>
"urbex, urban, exploring, abandoned, morgue, slab, table, cutting, high, key, forgotten, derelict, decay, decayed, old, former, hospital"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/15226909/whitewall-by-niki-feijen>