My Shits and Giggles

“…Today, with all sorts of equipment, caving has turned into something of an extreme sport - it involves climbing, crawling and sometimes even swimming. Looking at the most extreme end then, what about those caves that create the enigma, that fuel the stuff of legends; caves that appear bottomless and that seem to extend to the very center of the earth? What are the ten deepest caves on our planet?”

[10 Deepest Caves in the World]