Aare

The Aare () or Aar () is the main tributary of the High Rhine (its discharge even exceeds that of the latter at their confluence) and the longest river that both rises and ends entirely within Switzerland.

Its total length from its source to its junction with the Rhine comprises about , during which distance it descends , draining an area of , almost entirely within Switzerland, and accounting for close to half the area of the country, including all of Central Switzerland.

There are more than 40 hydroelectric plants along the course of the Aare.

The river's name dates to at least the La Tène period, and it is attested as ''Nantaror'' "Aare valley" in the Berne zinc tablet.

The name was Latinized as ''Arula''/''Arola''/''Araris''.}} Provided by Wikipedia