Aar(redirected from Aar Gorge)
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Aar,river: see AareAare
, longest river entirely in Switzerland, 183 mi (295 km) long, rising in the Bernese Alps and fed by several glaciers. The upper Aare emerges from dam-impounded Grimsel Lake and flows generally W through Lake Brienz, past Interlaken (where it is canalized),
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