Auyán-tepui, also spelled Ayan, is a tepui in Bolívar state, Venezuela. It is the most visited and one of the largest tepuis in the Guiana Highlands, with a summit area of 666.9 km2 and an estimated slope area of 715 km2. The uneven, heart-shaped summit plateau of Auyán-tepui is heavily inclined, rising from around 1,600 metres in the northwest to a maximum of 2,450 m in the southeast. It is incised from the north by a vast valley, the Cañón del Diablo, formed by the Churún River. The larger western portion of the plateau is partially forested, whereas the eastern part comprises mostly bare rock with only patchy vegetation cover. The mountain hosts a number of extensive cave systems.
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