Alisadr Cave is one of the wetlands in Iran and one of the few blue caves in the world. Geologists attribute the gems of this cave to the Jurassic period from the second period of geology (190-136 million years ago). Alisadra also has the longest rowing route inside the cave in the world. This cave is located at the al-Sayr al-Sayed Highlands near the village of Kaboordang in the province Hamedan is located. The height of the cave is 2100 meters above sea level. The cave area has twisted corridors and corridors. From a series of waters, a large lake has been created inside the cave, and thus penetration into the cave depths is possible only by boat. Alisadr Cave is one of the tourist attractions of Hamedan province. Alisadr Cave is the 23rd national natural work that was presented by the Cultural Heritage Organization on December 15, 2008 in Iran's Natural Heritage List.