Chwar Stoon cave is the focal point of a campus of ruins altogether broadly dated to the Auskani era (147- 226 BC), based on the reliefs there as well as earthenware remains and the stony foundations for walls of various buildings. Its common name is Kurdish and comes from the existence of four columns inside the cave.
Other major sites around the cave are a cluster of buildings at the tip of a ridge, and a tunnel connecting them to the cave. The mix of reliefs and structures suggest ancient ritual use coupled with later use for defense. It may also have had use by Christian hermits.
Chwar Stoon cave is also transliterated as Chwarstoon, Chewar Stoon, and Charstwn. Next to the cave are five reliefs which relate to ancient Mesopotamian symbols, associated with the god of age, Otto (moon god), the sun god, a Mitra god, Ishtar, and Zirwan. These also relate to Zoroastrian, but with a Mesopotamian emphasis on worship of the sun and moon. There is a tunnel leading to the cave which is about 11m long.
The entrance is devoted to Zoroastrian history.
There is a small campus of monastic-seeming ruins.
There is a tunnel with some carvings, connecting on side of the ridge to another.
The cave itself is fairly barren.