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Explore London Planetoddity, Fleet London, and more!

Tunnel vision: The beautifully constructed tunnels are in some places up to 40 feet below ground level

Going underground: Mile after mile of ornate brickwork and labyrinthine tunnels which reveal the beauty of London's hidden River Fleet

Down the tubes: A ghostly figure leans against a huge brick tunnel which was built to move sewage waters from the River Fleet into the Thames

Going underground: Mile after mile of ornate brickwork and labyrinthine tunnels which reveal the beauty of London's hidden River Fleet

Parts of the tunnels have been well preserved and maintained as the tidal river waters don't impact on their lifespan