Tepuis are flat-topped mountains found primarily in the Guiana Highlands of South America, particularly in Venezuela, Guyana, and Brazil. These unique geological formations rise sharply from the surrounding landscape, often featuring steep cliffs and a distinct flat summit. Tepuis are known for their rich biodiversity, hosting many endemic species of plants and animals. The word "tepui" comes from the Pemon indigenous language, meaning "mountain" or "table." These formations are remnants of ancient sandstone plateaus that have eroded over millions of years. Notable tepuis include Mount Roraima and Auyán-tepui, which are famous for their striking landscapes and unique ecosystems.