The Tower Subway, London

The second oldest tunnel running under the River Thames, running between Tower Hill on the north side of the river, through to Vine Lane on the south side of the river (just to the west of Tower Bridge). It was built in 1868 and pioneered the use of cast iron to line the tunnel, never having been used previously. It was used as a foot tunnel until the coming of the toll-free Tower Bridge. Nowadays the Tower Subway is used to carry telecommunications cables and is not open to the public

Cables Nowadays Oldest Pioneered Previously Subway Telecommunications Vine

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