London, England, UK - April 23, 2010: People walk along the River Thames Path outside London City Hall at sunset.
A pigeon rests on a concrete bridge pier on the Spoorlijn Utrecht - Kampen railway over the Vecht river in Utrecht.
The River Trym flows under viaducts of the A4 Portway road and Severn Beach Line railway into the estuary of the Avon at Sea Mills in Bristol.
