Public streetcars and buses are run by an organization called BernMobil. There are 3 streetcar lines and about 15 bus lines. Most of the lines are in the city but some travel away from the city. There is also the Marzilibahn, a funicular (inclined- or cliff-railway) which goes from the banks of the Aare up to the Federal Building (German: "Bundeshaus"). The Marzilibahn is 105 meters long. It is the shortest funicular in Europe. Another funicular, called the Gurtenbahn, goes from the section of Bern called Wabern, which is on the river Aare, up to the top of Gurten, a large hill 585 meters high that is just south of Bern. A small airport, Belpmoos, is located a short distance south of Bern in Belp.