Croydon Flyover
The Croydon Flyover is an overpass located in Croydon, London, England. It is part of the A232 road which connects Orpington with Ewell. The flyover connects Park Lane and the Croydon Underpass, on the A212 road with Duppas Hill Road. It crosses over the A236 Old Town and Southbridge Road, and the A212 Lower Coombe Street, as well as Croydon High Street near Croydon Clocktower.

The Croydon Flyover is an overpass located in Croydon, London, England. It is part of the A232 road which connects Orpington with Ewell. The flyover connects Park Lane and the Croydon Underpass, on the A212 road with Duppas Hill Road. It crosses over the A236 Old Town and Southbridge Road, and the A212 Lower Coombe Street, as well as Croydon High Street near Croydon Clocktower.
Check the official site before travelling; hours and prices can change.
More bridges

Tower Bridge
The bridge people mean when they say London Bridge. Walk the high-level walkway for the glass floor.

Millennium Bridge
Foot-only suspension bridge from St Paul's to Tate Modern — the only crossing aligned on St Paul's dome.

Hammersmith Bridge
Currently pedestrian-only, Victorian wrought-iron beauty — best photographed at golden hour.
Source: wiki-list