- a city in central Switzerland, on the Aar River, near the Lake of Thun.
- a lake in central Switzerland, formed by a widening in the course of the Aar River. 10 miles (16 km) long.
- a town in central Switzerland, in Bern canton on Lake Thun. Pop: 40 377 (2000)
- a lake in central Switzerland, formed by a widening of the Aar River. Length: about 17 km (11 miles). Width: 3 km (2 miles)