The amazing Ali Sadr cave is the most popular tourist destination and a beautiful natural attraction of Iran for all tourists, it is a Jurassic water cave with large deep lakes and walls up to 40 meters high, it has an internal river but the flowing of river is not visible and it looks like a silent lake with clear and calm water rather than a current river, most of the trip through the cave is done by pedal boats, it is 11.5 Km long and the second longest surveyed cave of Iran. The Ali Sadr Cave is a cave located 80 km north of Hamedan city, western Iran.

Ali Sadr is one of the excellent caves to offer for sightseeing in Iran. Ali Sadr Cave is opened to public since 1975 and has several visitors each year and it is one of the most visited caves of the world.

A man made entrance tunnel to this cave was built in 521-485 B.C in the reign of King Dareios I in the Kingdom of the Achaemenids, later most knowledge about this cave was lost. Cave was rediscovered in 1960 by a local shepherd looking for his lost goat and the other story tells, it was rediscovered in 1978, after the water from the spring diminished, a local guy of Ali Sadr village in search for the water followed the tunnel and found the cave. But certainly the cave is known to the local people from a very long time ago, it was a water reservoir for the people in nearby village of Ali Sadr.

Facts
Location: 80 km north of Hamedan city in Hamedan Province Iran,
Distance from Tehran: 350km E of Teheran.
Lengths: 11.5 km long.
The main chamber is 100m L X 50m W X 40 m H
Temperature = 11.5°C.
Guided tours by pedal boat: L=1,400m

How to Reach
From Tehran go by bus or by air to Hamadan city and then go by bus or by car to Ali Sadr Cave.