The Tower Subway is a tunnel beneath the River Thames in centra... - dofaq.co
tower subway

The Tower Subway is a tunnel beneath the River Thames in centra...

wikipedia - 02 Aug 2015
The Tower Subway is a tunnel beneath the River Thames in central London, between Tower Hill on the north side of the river and Vine Lane (off Tooley Street) on the south. In 1869 a 1,340-foot (410 m) circular tunnel was dug through the London clay using a wrought iron shield, a method that had been patented in 1864 by Peter W. Barlow. A 2 ft 6 in (762 mm) narrow gauge railway was laid in the tunnel and from August 1870 a cable-hauled wooden carriage conveyed passengers from o

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