Tower Subway: The World's First Underground Railway Under London’s Thames River

The Tower was the world's first underground transport tunnel.

A rail car travelled back and forth under the river between the banks of the Thames - a much admired technical innovation in 1870.

Even though the narrow iron tube was only used for a few months, it set a milestone in the history of transport.

History never comes back, but it gives us the joy of discovering the unknown.

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