Splügen (Romansh: Spleia, Italian: Spluga) is a former municipality in the Viamala Region in the Swiss canton of Graubünden. On 1 January 2006 Splügen incorporated its neighbouring municipality of Medels im Rheinwald. On 1 January 2019 the former municipalities of Hinterrhein, Nufenen and Splügen merged to form the new municipality of Rheinwald.
In 1995, the Swiss Heritage Society bestowed the Wakker Prize to Splügen.
The Splügen Pass (German: Splügenpass; Italian: Passo dello Spluga; Romansh: Pass dal Spleia 2,114 m (6,936 ft)) is an Alpine mountain pass of the Lepontine Alps. It connects the Swiss canton of Grisonian Splügen 5 kilometres (3.1 mi) to the north 675 metres (2,215 ft) below the pass with the Italian municipality of Chiavenna 21 kilometres (13 mi) to the south at the end of the Valle San Giacomo 1,789 metres (5,869 ft) below the pass.
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