The 40m deep cave can give off a phosphorescent glow

Gypsum deposits in the centre of the peninsula have given rise to the geological phenomena known as ‘desert roses’ (clusters of roughly rose-shaped gypsum crystals) and, most notably, the 40m deep cave at Dhal Al Misfir, formed largely of fibrous gypsum that sometimes gives off a faint, moon-like phosphorescent glow.

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