Here we have yet another crew of scientists and explorers going into areas unknown, this time, a vast subterranean cave system underneath the Carpathian mountains that appears to have been sealed up for centuries, and has gone mostly unexplored. (qwipster.net)
With tropical rainforests, vast subterranean cave networks and coral - filled waters, Belize's diverse landscapes makes it a haven for active, adventurous travellers... More (wanderlust.co.uk)
Snorkel through pitch black caves of the Sac - Actun subterranean cave and tunnel system at Jungle Maya ecopark, operated by Alltournative Ecological Adventures. (sandinmysuitcase.com)