Ihlara Valley is a canyon valley formed as a result of stream erosion by the lava erupted from Hasandağı volcano. Melendiz Stream, at the end of a process of millions of years, created this canyon-like valley, 14 kilometers long and reaching 110 meters in places. The Melendiz Stream, which led the canyon through these cracks to take its current form, was called "Potamus Kapadukus", which means Cappadocia River, in the early ages.
The 14 km long valley begins in Ihlara and ends in Selime. Melendiz Stream meanders through the canyon. The length of the stream, which meanders more than 26 between Ihlara and Selime, is 8 km, but in reality it reaches 13 km. The height of the valley is 100-150 m in places. There are countless shelters, tombs and churches carved into the rocks along the valley. The decorations in the churches in Ihlara Valley started from the 6th century and continued until the end of the 13th century.
Some shelters and churches are connected to each other by tunnels as in underground cities.