The town of Ortahisar in Cappadocia, a region in central Turkey famous for its fairy chimneys, rock formations that may reach 40 m (130 ft) in height. Over thousands of years, wind and rain have eroded layers of consolidated volcanic ash to form the area's landscape. Early occupants of the area dug tunnels into the exposed rock face to build residences, stores, and churches, now home to Byzantine artwork.Photo: Mila Zinkova