London’s river is the Thames, right? Wrong. There are no less than 21 tributaries that flow into the Thames in Greater London. Some of these flow silently through their neighbourhoods, generally unnoticed by all but a few, but others have been buried under layers of streets and housing, and never see the light of day…

In this walk through trendy Shoreditch and its polar opposite neighbour, the City of London, I argue the case for the Walbrook being one of the most important rivers in the world. Lost to us for over 500 years, its waters still flow beneath our feet. As we travel the route of its vanished valley, you will hear stories of Shakespeare, raving lunatics, and an earthquake that shook London.