Aare River

Also spelled  Aar,   tributary of the Rhine and the longest stream (183 miles [295 km]) entirely within Switzerland; it drains an area of 6,865 square miles (17,779 square km). The river rises in the Aare Glacier of the Bernese Alps in Bern canton, below the Finsteraarhorn and west of the Grimsel Pass, in the south-central part of Switzerland. As the Aare flows north past Meiringen, the river cuts through the scenic