Kew Gardens station (London)
Kew Gardens is a Grade II–listed interchange station on the District line of the London Underground and the Mildmay line of the London Overground. Located in Kew in the London Borough of Richmond upon Thames, it first opened in 1869 and is now managed by London Underground. The station, which is in London fare zone 3 and 4, is situated midway between Gunnersbury and Richmond stations.

Kew Gardens is a Grade II–listed interchange station on the District line of the London Underground and the Mildmay line of the London Overground. Located in Kew in the London Borough of Richmond upon Thames, it first opened in 1869 and is now managed by London Underground. The station, which is in London fare zone 3 and 4, is situated midway between Gunnersbury and Richmond stations.
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