Göreme Open Air Museum

Göreme is a district of the Nevşehir Province in Turkey. After the eruption of Mount Erciyes about 2.6 million years ago, ash and lava formed soft rocks in the Cappadocia region, covering a region of about 20,000 square kilometres. The softer rock was eroded by wind and water, leaving the hard cap rock on top of pillars, forming the present-day fairy chimneys. People of Göreme, at the heart of the Cappadocia region, realized that these soft rocks could be easily carved out to form houses, churches, and monasteries. These Christian sanctuaries contain many examples of Byzantine art from the post-iconoclastic period. These frescos are a unique artistic achievement from this period.

In the 4th century, small anchorite communities began to form in the region, acting on the instruction of Saint Basil of Caesarea. They carved cells in the soft rock.

Source: Wikipedia