Namakdan Cave on Qeshm Island is one of the masterpieces of creation. Namakdan salt dome is among natural attractions of Qeshm Island, which attracts a lot of tourists every year. In Farsi, the word “namak” means salt. This cave is the longest salt cave in the world. It is 6850 meters long. According to recent researches, breathing in the caves may be useful for curing asthma. The underground water, which erupts in the cave, flows on mountain slopes in the form of a salt spring. It piles up in a hole and looks like snow. Elements such as magnesium are also found in the cave.