Wigan, GB
The Adam Viaduct is a grade II listed concrete underbridge in Wallgate, Wigan. The bridge, constructed in 1946, is the earliest 'post-tensioned' prestressed concrete railway bridge in the United Kingdom, with only some examples in Switzerland being earlier. It is bridge number 54 on the Kirkby branc
h line and is at a line distance of 18 miles 1,032 yards (29.91 km).
Listen to the audio guide for Adam Viaduct Free on WIP — starts by itself when you arrive, even with the screen off