<http://schema.org/about>
"Consider this an Earth-bound travel guide to the solar system, places on Earth that closely resemble landscapes of other planets."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/photos/10-places-on-earth-that-resemble-alien-planets/deep-sea-hydrothermal>