The underground cave site of Derinkuyu, Turkey, commonly referred to as “Cappadocia”, is an underground network of caves and tunnels which date back to the prehistoric era as evidence of stone tools have been uncovered. 20,000 - 60,000 people inhabited the caves with evidence of air vents and water wells making it possible to live underground for long periods of time, spanning years even. Stone wheels made of volcanic basalt were fashioned to create what’s referred to as “self sealing doors”. Th...
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