Viaduc de Châteaulin, Railway viaduct transformed into road bridge in Châteaulin, France.
The viaduct of Châteaulin is a former railway bridge spanning the Aulne River with eleven masonry arches. It now functions as a single-lane road bridge adapted for everyday local traffic crossing.
The structure was built in 1906 to connect two railway stations and served rail traffic for over 60 years. After the line closed in 1967, it was converted into a road bridge serving the town.
The structure reflects local Breton identity through its use of regional stone materials sourced from nearby quarries. Walking across it today, you encounter a piece of Brittany's working landscape that remains integral to the community.
The bridge is accessible on foot or by car, though it remains narrow and accommodates one direction of traffic at a time. Visiting during off-peak hours allows a more relaxed walk across and better views of the river below.
Two distinct local stones shape the bridge's appearance: darker kersanton forms the visible parapet stones, while lighter granitic material fills the arches. This choice reflects how early 1900s builders selected materials based on both availability and practical durability.
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