Landforms are natural shapes on the Earth's surface and include plains, plateaus, hills, mountains, valleys, depressions, canyons, peninsulas, islands, archipelagos, coasts, lakes, rivers, capes, gulfs, bays, and straits or channels. Plains are flat areas, plateaus are flat, high areas, hills are small elevations, and mountains are high areas surrounded by lower land. Valleys are low areas between high lands, depressions are lower areas, and canyons are deep, steep valleys.