Ancient Civilizations (2017)

S4E4 Underground Cities of Cappadocia

The intriguing underground cities of Cappadocia, such as Derinkuyu, raise questions about their origins. Were these remarkable subterranean structures created by ancient, highly advanced beings possibly from another world? Alternatively, could they have been constructed by humans, or perhaps gifted by pre-diluvian deities to aid humanity in surviving cataclysmic events?