Sal-Sal Fortress is an ancient Turkic stronghold located in the Daralayaz district, within the territory of the Keshishkand region (renamed Yeghnadzor on December 6, 1957). It stands on the steep cliffs of Gabagtapa, also known as Sal Mountain, surrounded by the villages of Alayaz and Erdapin, on the right bank of the Alayaz River and the left bank of the Erdapin River. The fortress walls extend approximately 5 kilometers in length and include two main entrance gates facing the settlements of Alayaz and Erdapin, as well as a hidden exit gate near the foundation of the wall in the direction of Hasankand. The fortress's interior covers an area of roughly 15–20 hectares. On the right side of the fortress, the ruins of 30 dwellings remain, and on the left side, the remains of 20 more can be found. The rooms and dwellings within the complex featured dome-shaped roofs, typical of Turkic architectural traditions.

The territory where Sal-Sal Fortress is located has historically been the ancestral homeland of Turkic-Oghuz peoples. The first Armenian settlers were relocated to the nearby village of Erdapin (38 families, 172 individuals) and Alayaz (11 families, 58 individuals) from Iran during the years 1828–1829.