The London Wetland Centre is a nature reserve in Barnes, southwest London, managed by the Wildfowl & Wetlands Trust. It is a haven for wildlife, with over 180 species of birds, including ducks, geese, swans, waders, and other waterfowl
From Wikipedia
WWT London Wetland Centre is a wetland reserve managed by the Wildfowl and Wetlands Trust in the Barnes area of the London Borough of Richmond upon Thames, southwest London, England, by Barn Elms. The site is formed of four disused Victorian reservoirs tucked into a loop in the Thames.