The Roodafshan Cave is located in Roodafshan valley, Tehran Province, Iran. The length of this spacious cave is 1,502 m with a vertical distance of -90.6 m.
The entrance of the cave is elliptic with a 40 m width and 12 m height, and from this perspective, it has the biggest natural entrance and it is very attractive to the all tourists and cavers. After passing this big entrance with a sloped surface and stony and rocky way, you reach to the second entrance, which is rather smaller than the first. Here, again the ground and the floor of the cave are smooth and a large portion of it receives light from the first entrance.
About 35,000 years ago, due to the Damavand's volcanic activities, the entrance of the cave that was hidden behind a big and huge rock, was cracked and little by little, it propagated. At the right hand-side of the cave, there is a strong wall, and at the left of it, there is another deep split. According to the opinion of archeologists the skeleton discovered here belonged to the Achaemenian or the Sassanid period. The cave has plentiful of stalactites and stalagmites. Although the cave is wet, you can’t see any running water. The depth of the cave is 700 or 800 m. At the end, there is an elevated passage to a small room. By using a ladder, we can climb into the small room. This room leads to the other sections of the cave through a narrow hallway. In this part of cave, the water is stagnant on some parts, but water current could be detected underneath.