This Man's Chickens Found a Mysterious Underground City in Turkey

In 1963, a homeowner in the Turkish town of Derinkuyu was renovating his basement after his chickens kept disappearing through a small crevice in the wall. When he knocked the wall down, he uncovered a hidden tunnel leading 85 meters underground into the largest excavated subterranean city in Turkey. Carved directly into soft volcanic tuff rock, this massive Cappadocian complex could shelter up to 20,000 people alongside their livestock. In this video, we explore the brilliant subterranean engineering that made long term survival possible, from concealed air shafts and heavy, one-way rolling stone doors to a water supply protected against surface poisoning. We also unearth the true history of Malakopi, revealing why this city was never lost for millennia, but abandoned just 40 years before a sledgehammer opened it back up. Video Timestamps: 0:00: Disappearing Chickens and the 1963 Basement Discovery 0:36: Cappadocia and the Unique Properties of Volcanic Tuff 1:06: Linseed Oil Presses and Evidence of Long Term Habitation 2:02: Ventilation Engineering: Keeping 20,000 People Alive 2:55: Millstone Defense Doors and Sectional Containment 4:05: The Deep Well and Preventing Surface Water Contamination 5:03: Who Built Derinkuyu and the Challenge of Dating Rock Excavations 6:12: Malakopi and the Continuous History of Cappadocian Greeks 6:51: The 1923 Population Exchange and Demystifying the Lost City Engineering and Historical Insights: - Long Term Survival Infrastructure: The presence of linseed presses demonstrates that inhabitants produced their own fuel for oil lamps, preparing for extended periods underground long before running out of light became a crisis. - Concealed Ventilation Hierarchy: More than 50 ventilation shafts supplied fresh oxygen, featuring a main central shaft measuring roughly 3 meters by 2.8 meters that deliberately avoided opening to the surface so attackers could not locate or choke the main air intake. - One-Way Sectional Defense: Massive circular stone slabs weighing hundreds of kilograms could only be rolled into position from inside the passage, creating narrow chokepoints that allowed defenders to fall back and isolate one section at a time. - Controlled Water Supply: A well reaching over 55 meters deep supplied water to both the surface town and the underground refuge, equipped with an interior shut-off valve that prevented surface besiegers from poisoning the water or climbing down. - The 40-Year Myth: Derinkuyu, historically known as Malakopi, was not an ancient city forgotten for thousands of years. It was continuously used by local Greek Christians until the forced population exchange of 1923, meaning the tunnels had been abandoned for only four decades when discovered in 1963.