Qaqa Mach'ay

Qaqa Mach'ay (Quechua for "rock cave") is a limestone cave located in the Yauyos Province of the Lima Region in central Peru, high in the Andes Mountains that was explored and surveyed in 2004 by an international expedition. At 4,930m above sea level, it is the highest surveyed cave in the world (subsequent GPS measurements suggest this elevation is understated). The entrance to the cave is in the mountain named Wamp'una.

Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).