Its length is 3500meters and a subterranean watercourse flows through it. Peshna Cave has been proclaimed a monument of culture. At the very northern part of the cave, following torrent rains and melting of a snow, a powerful spring emerges, which in the arid periods of the year completely dries up.
At the entrance of the cave, a medieval citadel exists. According to the legends, this citadel was built for one of the sisters of Krali Marko. Peshna is registered as a locality from the late ancient period in Macedonia.