This great photo is Pete and Anthony Smith at Craighead Viaduct. The date is 1958.
Taken from the Blantyre side, it shows the former railway viaduct in good perspective and indeed the elevated pedestrian walkway below the track. Houses can be seen on the Bothwell side in the background.
The viaduct spans the River Clyde and the pillars are now brought down, one of which collapsed by its own accord.