When you read Jules Verne’s “ Twenty Thousand Leagues Under the Sea” you find yourself caught in the bottomless parts of the earth and  you really imagine seeing it in front of you : “Ali-Sadr cave” is the exact place in the middle of the earth that really helps you turn your dreams into vivid realities.Ali-Sadr cave is the largest aqueous cave in the world and it can be definitely named the most distinctive tourism brand of Hamedan province. This marvelous cave was discovered in 1963 and in the 1970s it was used as a tourist site for the first time by the unflagging efforts of “Abdullah Hajilu”,  the head of Hamedan’s Mountaineering Council.

Ali-Sadr is one of the most spectacular natural sites in Iran and also in the world because of its large and sailable rivers and also numerous long aqueducts which are spread all over the cave. It is a unique geological phenomenon which only a few caves in the world such as “ Moulis Cave” in France and “Knight’s Cave” and “ Boukan’s Cave” in Australia can equal its splendid sceneries. The taste of waters from the rivers of the cave is normal as well as its color and smell and there is no sign of animal life in it. Its temperature remains consistent throughout the year ( about 12 centigrades) and the water is very translucent to the degree that one can see its depth up to ten meters in natural light without any blurs. The river’s depth varies from ten meters to fourteen meters in some parts. The cave’s water originates from underground water springs, gradual spattering and oozing of water from the roof and walls of the cave which in turn are supplied from the regular rainfalls.
This cave has a distance of about 75 kilometers from Hamedan’s northern west and has borrowed its name from a neighboring village.