This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
Built in the 1830s, this is one of London's oldest still-working sewer lines. This tunnel is also the remnant of the Walbrook Stream or River, so called because it was once the only significant watercourse to flow through London's fortified walls. The river began to disappear as early as the Roman era, and it was already used as an open sewer long before that.
The groundwater in the area-- possibly the same springs that once fed the Walbrook-- has worked its way through the brick of the tunnel, and small streams of water spray into the tunnel from every direction. London Bridge Sewer, London, England, 2007