This cave is located in the heights facing the Haj Arah village of Zanjan. At present no road way facilities are provided and the only way to get there is to trek. This large cave has come about from limestone deposits. Remnants in these caves date back thousands of years at least 16-30000 years BC. Inside the cave some apparatus, tools, stone blades and even skeleton of hunted animals have been found. The focal point of interest is the fact that the prehistoric abided by certain limits regarding dwelling within these caves and defined limits in respect to each other, which throws light on. The architectural effects seen here reveals the insolation of their biosphere and determination of their living limits and properties.