"Man Discovers Abandoned Underground City in Basement"

A man in Turkey rediscovered an ancient underground city, Derinkuyu, in the 1960s when he found a tunnel behind a wall in his basement. The city, which was built by the Phrygians in the 8th to 7th centuries BC, was used for storage and as a hiding place during invasions and conflict. At its peak, it was home to 20,000 people who were able to survive underground for months at a time. Today, Derinkuyu is open to visitors and is part of a UNESCO World Heritage site.