The geographical feature characterized by a flat-topped hill is known as a mesa. Mesas are prominent landforms that rise sharply above the surrounding terrain, typically formed through erosion that strips away softer rock layers, leaving behind a resistant capstone. They are commonly found in arid and semi-arid regions and can vary widely in size and ecological significance. Mesas often feature unique ecosystems and habitats that support various plant and animal species. They are not only geological wonders but also hold cultural and historical importance, often serving as sites for indigenous peoples and archaeological research.