<http://schema.org/description>
"From a thousand year old cave carved out of volcanic rock in Turkey, to going \"down under\" in an Australian desert-like opal mining town or an ancient rock fortress in France, there's plenty of options for the  traveler looking to get in touch with their Neanderthal roots."^^<http://www.w3.org/2001/XMLSchema#string>
<http://newatlas.com/underground-holiday-destinations/9545/>