Tags: Cave.
Sof Omar Cave is the longest cave in Ethiopia at 15.1 kilometres (9.4 mi) long; sources claim it is the longest system of caves in Africa and ranks as the 306th longest in the world. It is situated to the east of Robe in the Bale Zone of the Oromia Region in southeastern Ethiopia (6°55′N 40°45′E) through which the Weyib River (Gestro River) flows. It sinks at the Ayiew Maco entrance and reappears at the Holuca resurgence 1 kilometre (0.62 mi) away.