Salt domes can be seen in different parts of southern Iran. One of the important examples is Qeshm salt dome. Such salt domes can also be seen on the island of Hormuz.
Rainbow Cave is located in the southeastern part of the island, about 10 km from Hormoz. It is a bit difficult to reach, but it can be crossed by everyone with caution.
Gel-Afshan-e Chegardani-Lash is located near a village of the same name, which is necessary to visit with the help of local people due to the lack of traffic signs.
Various theories have been proposed for this phenomenon, the most likely of which is the increase in ground pressure due to the presence of hydrocarbon gases.