Greenland Dock

Greenland Dock is the oldest of London's riverside wet docks, located in Rotherhithe in the area of the city now known as Docklands. It used to be part of the Surrey Commercial Docks, most of which have by now been filled in. Greenland Dock is now used purely for recreational purposes; it is one of only two functioning enclosed docks on the south bank of the River Thames.

More information on the Wikipedia page.