River Thames

From Hellgatewiki.com

The River Thames is a famous river in England. It flows through the capital, London. In post apocalyptic London, however, it is merely a dry riverbed. Cityscapes (and demons) tower over you as you traverse the barren landscape in the Millennium Battle.

"Towering Vortex Goliaths attack in the Millennium Battle quest area of the dry Thames River."--Flux