SNCF B 81661 is passing near Cize-Bolozon in a spectacular scene on the Cize-Bolozon viaduct which is a road-rail bridge crossing the Ain gorge in France.
The viaduct was originally constructed in 1875 but it was destroyed in the World War 2, and then reconstructed as an urgent post-war project due to its position on a main line to Paris. The viaduct was reopened in May 1950.
The bridge carries road and rail traffic at very different levels. The railway forms part of the Ligne du Haut-Bugey which was closed for reconstruction in 2005 (including reinforcement and restoration of the viaduct) and reopened in December 2010. The local road from Poncin to Thoirette uses the lower level.