The landform characterized by high rock walls and a flat top is known as a mesa. Mesas are prominent features in arid and semi-arid regions and are formed through erosion processes that leave a flat-topped hill standing isolated from the surrounding terrain. They are commonly found in the western United States, parts of South America, and Africa. Mesas are significant for their unique ecosystems, often hosting specialized flora and fauna. Additionally, they provide striking landscapes and are frequently featured in geological studies and explorations.