Ali-Sadr Cave is one of the cave wetlands in Iran and is one of the few blue caves of word. That is also the world’s largest water cave. This cave is located near the Kabudarahang city in the Hamedan province. The cave area has numerous corridors. Inside the cave there is a large lake and for this reason, penetrate deep into the cave is possible only by boat. It is one of the best tourism attractions in Hamedan province.
Geologists attributes the old stones of this cave to the Jurassic period (190-136 million years ago).