The geographical term for an upland area characterized by flat land is a plateau. Plateaus are elevated flatlands that rise sharply above the surrounding area and can be formed by volcanic activity or erosion. They can span large regions and are found all over the world, often providing unique ecosystems and climates. Due to their elevation, plateaus can influence local weather, create distinct biodiversity, and serve as critical habitats. They are also valuable for agriculture and other land uses due to their flat terrain.