two unrecognizable tourists at the entrance of gruta da lapa doce, cave in iraquara, chapada diamantina, bahia, brazil

america bahia brazil calcite cave cavern chapada dark darkness deep diamantina doce dry earth ecological ecology ecosystem ecotourism entrance enviroment formation geological geology ground gruta inside interior iraquara lapa lencois minerals mining national nature park resources rock south stalactite stalagmite stones tourism travel underground vegetation wilderness