Derinkuyu is a multi-level underground city extending to a depth of approximately 60 meters.
Mazı Underground City is a complex subterranean network in the Cappadocia region of Turkey.
Balbissa is an ancient city whose ruins are visible in modern-day Turkey.
Göreme Historical National Park is renowned for its unique rock formations and cave dwellings.
The Zelve Monastery is a sprawling Byzantine-era complex.