The region includes some of the world's largest glaciers like the Baltoro and Siachen Glaciers. Glacial lakes are lakes created by the direct action of glaciers and continental ice sheets. Glacial landforms are landforms created by the action of glaciers. The Indian Army continues to control all of the Siachen Glacier and its tributary glaciers. In contrast valleys concentrated ice flow forming fast glaciers or ice streams. Gilgit Baltistan's landscape includes mountains, lakes, glaciers and valleys. Glacial bodies larger than are called "ice sheets" or "continental glaciers". Lakes may form in basins where there is sufficient precipitation or meltwater from glaciers above. The processes and features caused by or related to glaciers are referred to as glacial. Fresh water is found in rivers, lakes, wetlands, groundwater, and frozen glaciers. Warming temperatures lead to the melting of glaciers and ice sheets. Mountains erode slowly through the action of rivers, weather conditions, and glaciers. Bays also form through coastal erosion by rivers and glaciers. Ice sheets are bigger than ice shelves or alpine glaciers. Native Americans hunted in high meadows below receding glaciers.