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, by Barn Elms. The site is formed of four disused Victorian reservoirs tucked into a loop in the Thames.
The centre first opened in 2000, and in 2002 it was recognized as a Site of Special Scientific Interest as the Barn Elms Wetland Centre.
The centre occupies more than 100 acres (40 hectares) of land which was formerly occupied by several small reservoirs. These were converted into a wide range of wetland features and habitats before the centre opened in May 2000. It was the first urban project of its kind in the United Kingdom.