A tepui is a flat-topped mountain or mesa found primarily in the Guiana Highlands of South America, particularly in countries like Venezuela, Guyana, and Brazil. These geological formations are characterized by steep cliffs and a unique ecosystem that supports a variety of endemic plant and animal species. Tepuis are often considered ancient landforms, having remained relatively unchanged for millions of years. The word "tepui" comes from the indigenous Pemon language, meaning "house of the gods." These formations are not only significant for their biodiversity but also for their cultural importance to local indigenous communities. Many tepuis, such as Mount Roraima, are popular destinations for hikers and researchers interested in their unique landscapes and ecosystems.