For decades, the capital's waste has been piled onto a landfill site on the north bank of the Thames Estuary.
Now it's being given an overhaul - and transformed into a nature haven for rare birds, bees and reptiles. It will eventually expand to cover 845 acres - around twice the size of Regents Park. Here's Piers Hopkirk.
A major new wildlife haven has opened at a former landfill site at Thurrock in Essex today.
The Thameside Nature Park is one of The Wildlife Trust's largest restoration projects, transforming the 120-acre Mucking Landfill into a range of wild habitats. The land is now home to rare bees, birds and reptiles, other animals and plants.