In 1963, a man in Cappadocia, Turkey, found a secret passage behind a basement wall and uncovered Derinkuyu, a vast underground city reaching 85 meters deep across 18 levels. Built by ancient Phrygians and expanded by early Christians, it once sheltered up to 20,000 people with chapels, kitchens, stables, ventilation shafts, and stone doors.
This engineering marvel reveals how ancient societies built for survival and secrecy. Would you explore a lost city beneath your home?
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