Kef Toghobeit Cave

Kef Toghobeit is a karst cave near the settlement of Bab Taza in Chefchaouen Province, Tanger-Tetouan-Al Hoceima, in northern Morocco. Currently known to be 4,078 m (13, 379 ft) long and 722 m (2, 369 ft) deep, it is the deepest cave in Morocco, and the third deepest cave in Africa. Although Kef Toghobeit has been well-explored, its full extent is not yet known. Only 1000 caves are known in Morocco, many of them barely mapped, although the geology would suggest that many more do exist.

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