The Walbrook is a subterranean river in London. It gives its name to the Walbrook City ward and to a nearby street. It played an important role in the Roman settlement of Londinium.
St Stephen Walbrook
London Mithraeum, ruins of the cult of Mithras stemming from ancient Persia by way of the Romans
Subterranean rivers of London
The subterranean or underground rivers of London are or were the direct or indirect tributaries of the upper estuary of the Thames that were built over during the growth of the metropolis of London. They now flow through culverts, with some of them integral parts of London's sewerage system and diverted accordingly.
The position of a mouth of the Effra in the 13th century.
The culverted mouth of the Earl's Sluice at Deptford Wharf
The Moselle on the surface flows through Tottenham Cemetery on its way to the Lea.