The Ihlara Valley (or Peristrema Valley; Turkish Ihlara Vadisi) is a canyon which is 15 km long and up to 150 m deep in the southwest of the Turkish region of Cappadocia, in the municipality of Güzelyurt, Aksaray Province.

From the 7th century AD, the valley was settled by Byzantine monks who dug their houses and churches out of the tuff stone, which had been deposited by the eruptions of Mount Hasan.

The first consists of the churches near the village of Ihlara, which are decorated with paintings of a local Cappadocian type that show influence from Persia and Syria to the east.

The second group is located near the village of Belisarma and consists of churches in the Byzantine style of the tenth and eleventh centuries, known as Macedonian art.

In the Niğde Archaeological Museum, there is a display of the mummies of a woman and four children who were entombed in the Ihlara Valley in the 10th century AD.