Auyán-tepui , also spelled Ayan, is a tepui in Bolívar state, Venezuela. It is the most visited and one of the largest (but not the highest) tepuis in the Guiana Highlands, with a summit area of and an estimated slope area of . The uneven, heart-shaped summit plateau of Auyán-tepui is heavily inclined, rising from around in the northwest to a maximum of in the southeast. It is incised from the north by a vast valley, the Cañón del Diablo (Devil's Canyon), 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.