Landforms include mountains, valleys, plateaus, canyons, plains, and islands. Mountains are the highest form of land with peaks, valleys are lowlands between mountains, and plateaus are flat areas higher than the surrounding land. Canyons are deep valleys with steep sides. Bodies of water consist of oceans, rivers, and lakes, with oceans being the largest bodies of water on Earth, rivers being long flowing bodies of water, and lakes being bodies of water surrounded by land.