Putney
Putney is an affluent district in southwest London, England, in the London Borough of Wandsworth, five miles southwest of Charing Cross. The area is identified in the London Plan as one of 35 major centres in Greater London.

Putney is an affluent district in southwest London, England, in the London Borough of Wandsworth, five miles southwest of Charing Cross. The area is identified in the London Plan as one of 35 major centres in Greater London.
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