<http://schema.org/about>
"What is so big that it can be seen from space? We've got a few surprises, including something notable for not being on the list."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/photos/10-things-massive-enough-to-be-seen-from-space/the-himalayas>