"Regarded by visitors as one of Qatar’s most vividly exciting destinations, the 40m deep cave can give off a phosphorescent glow which has an otherworldly look. The glow is the result of Gypsum deposits which are found in the centre of the peninsula and have given rise to the geological phenomena known as ‘desert roses’ (clusters of roughly rose-shaped gypsum crystals). Most notably, the 40m deep cave at Dhal Al Misfir was formed largely of fibrous gypsum that sometimes gives off a faint, moon-like phosphorescent glow. "