The Albis is a chain of hills in the Canton of Zurich, Switzerland, stretching for some 19 km from Sihlbrugg in the south to Waldegg near Zurich in the north. The chain forms, among others, the border between the Affoltern and Horgen districts. The best known point is Uetliberg at 870 m, overlooking the city of Zurich. Other points of interest include the Albishorn (909m.) the Bürglen (also known as Bürglenstutz, the highest peak, 914.6m.), the Schnabelburg, an observation tower, the Albis Pass, the small town of Buechenegg, and the extensive woods (known as the Sihlwald forest) on both sides of the river Sihl. The Sihl Valley borders the Albis chain on its entire east side. On the west side, the Albis is bordered by various streams (including the Reppisch) and one lake, the Türlersee.