A geographical feature that describes a large, steep-sided hill is a mesa. Mestas are characterized by a flat top surrounded by steep slopes, typically formed through erosion of softer sedimentary rocks. Found primarily in arid and semi-arid regions, mesas can serve as important ecological niches, harboring unique plant and animal species. The formation and appearance of mesas can vary significantly depending on geographic location, and they are often scenic landmarks, drawing hikers and photographers due to their distinct shapes and surrounding landscapes.