Langjökull glacier is the second largest glacier in Iceland. It has an area of about 950 km² and most of it rises between 1200 and 1300 m above sea level. The volume of the glacier is about 195 km³ and the thickness of the ice is up to 580 meters (1,900 ft). In the last years, Langjökull has been shrinking, just like most glaciers in the world. Organized snowmobiling / snow scooter tours are available on the glacier all year round. The glacial river Hvítá takes its source in Langjökull Glacier. Gullfoss, one of the largest waterfall in Iceland is in the river Hvítá.