Into Lake Thun.
Thun
Normally a lake does not flow: that is what distinguishes a lake from a stream or river.
The river with its source at the confluence of the Bois de Sioux River and Otter Tail River does flow into to Lake Winnipeg
Lake Oconee
lake michigan
If by "surround" you mean rivers that form the border of Switzerland, the answer is the Rhine.The Rhine approximately follows Switzerland's eastern border with Liechtenstein and Austria, and its northern border with Germany. Is say "approximately" because in many places the border is a few Km from the Rhine.Other important rivers are the Rhone, which flows through Lake Geneva, the Inn, Ticino and Doubs.
the river Aare
Usually another river or the sea or a lake
Usually another river or the sea or a lake
The Aare
The Aare is a river which is wholly within the country of Switzerland.
Lake Michigan