The Wash

The Wash is a shallow natural rectangular bay and multiple estuary on the east coast of England in the United Kingdom. It is an inlet of the North Sea and is the largest multiple estuary system in the UK, as well as being the largest natural bay in England, and is the outflow for the rivers Witham, Welland, Nene and the Great Ouse, where Europe's only supervolcano lies underneath it. It is also on... (Wikipedia)