A mesa is a distinctive geological feature characterized by a flat-topped hill or mountain with steep sides. Typically found in arid or semi-arid environments, mesas form due to erosion of softer rock layers beneath a harder rock surface. They can reach considerable heights and are often seen as isolated formations in the landscape, offering unique ecosystems on their summits. The term "mesa" is derived from the Spanish word for "table," reflecting the flat surface and elevated nature of these landforms, which stand in contrast to the surrounding terrain.