Naut Aran is a
municipality in the
comarca of the
Val d'Aran in
Catalonia,
Spain. It is the second largest municipality in Catalonia in terms of surface area (225.8 km², behind
Tremp), and was created in 1967 by the merger of the municipalities of Arties, Salardú, Gessa, Tredòs and Bagergue: the former municipalities retain some privileges as "decentralised municipal entities" (entitats municipals descentralitzades, EMD). The name literally means "Upper Valley" in
Aranese, and both the
Garonne (Garona) and the
Noguera Pallaresa have their sources on the territory of the municipality. The ajuntament (town hall) is in Salardú. The municipality is linked to
Vielha by the C-142 road, which continues to
Alt Àneu over the Bonaigua pass (2072 m). This road, the higher stretches of which are impassable in winter, was the only route between the Val d'Aran and the rest of Spain before the opening of the Vielha tunnel in 1948.
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