Roodafshan Cave in Damavand is located on Tehran-Firouzkouh Road after passing Mount Damavand, near a village with the same name. It takes almost one-hour-climbing to reach the entrance. The cave features a large entrance with 40 meters width and 12 meters height, along with several vast halls. As you pass the first entrance through the sloped surfaces and uneven path, the second entrance shows up. There are some pouches and remnants of skeletons and potteries in the first hall proving the fact that ancient human had lived there in the past. This hall lacks lime stone decorations. The second hall with 8 meters distance from the first one has an anticline (an arch-like shape) with dimensions of 50 to 60 meters. There is a big gap between the walls of this hall and this hall also lacks lime stone decorations as well. There are plenty of stalagmites in third hall hanging from the ceiling of the cave. There is a corridor at the end of the third hall where you can see a very big stalagmite. While visiting this cave don't forget to equip yourself with proper shoes, backpack and sufficient means of caving.