The open-air museum of Zelve in Cappadocia covers several valleys with hundreds of cave hoses, churches, chapels, mosques and a mill. People lived here until the late 40s of the 20th century, when an earthquake destroyed many caves. Another earthquake in the 90s damaged some more parts of the cave-rocks. Now they are not open to the public anymore.
Cappadocia is an eroded landscape of volcanic tuffstone. Wind and weather created rocks in the funniest shapes. The tuff stores a lot of water and makes the valleys very fertile. Since 1985 Cappadocia is a UNESCO World Heritage site. Unfortunately the greed for money of companies and people is destroying this unique landscape.