Karaftu

The Karaftu Caves (Kurdish), also known as Karaftu Castle, are a mixture of natural and human-made caverns located on a mountainous terrain between Saqqez and Divandarreh, Kurdistan province, Iran. The limestone caves, situated at an altitude of approximately 2,000 m and stretching over 750 m, were formed naturally, but were modified by inhabitants over the centuries.

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