Brazilian Caves
ABSTRACT
Toca da Boa Vista, the longest known cave in the Southern Hemisphere with 84 km of mapped passages, is one of the most important speleological and palaeontological sites in Brazil. Together with the neighbouring caves of Toca da Barriguda, Toca do Calor de Cima, Toca do Pitú and Toca do Morrinho, they represent a geological [...]
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The Door To Hell
The Door to Hell, as locals call it, is situated near the small town of Darvaz in Uzbekistan. Thirty-five years ago, geologists were drilling for gas when then encountered a very large cavern [...]
