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Greenwich Foot Tunnel is a pedestrian way that links both River Thames margins in the south east of London, Docklands (north) with borough of Greenwich (south)
The Tunnel is 1217feet in length and is lined with 200,000 glazed white tiles.
The shafts at each end are 44 feet deep at the Isle of Dogs and 50 feet at Greenwich.
The Tunnel is 33 feet underwater at low tide and 53 feet under at high tide.