The park is one of the largest wilderness areas still intact in Southern Norway. Much of the original alpine ecosystem, including wild reindeer, wolverines, golden eagles, gyr falcons, and ptarmigans, is still intact. The park is made up of numerous mountains and valleys. The highest mountains in the park tower more than 2,000 metres (6,600 ft) above sea level. The landscape in Reinheimen is extremely varied. In the west, it is very dramatic, with sharply pointed peaks and knife-edge ridges, and rapidly flowing rivers. Towards the east, the terrain is more gently sloping, plateaus occur, valleys are broader and rivers flow more slowly. A number of rivers, such as the Istra, Rauma, Lora, Finna/Skjerva, Valldøla, and Tora/Føysa, have their sources sources in Reinheimen.