With a depth of nearly 40m, the Dahl Al Misfir Cave is one of the lesser-known natural wonders in Qatar. Believed to have been formed nearly five hundred thousand years ago, the cave dates back to the mid-Pleistocene. The sinkhole's opening is protected by a fence so that visitors can experience it from a safe distance. The bottom of the cave can be reached via a gate which leads tourists down to the depths of Al Misfir. Those who dare to explore the interior of the cave will notice the phosphorescent glow of every surface thanks to the gypsum deposits inside the cave.