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Tower Subway, the world's first underground tube railway, opens in London, England, United Kingdom.
Related Wikipedia articles
Tower Subway
Tunnel beneath the River Thames in Central London, England
The Tower Subway is a tunnel beneath the River Thames in central London, between Tower Hill on the north bank of the river and Vine Lane on the south. In 1869 a 1,340-foot-long (410 m) circular tunnel was dug through the London clay using a cast iron circular shield…Source: Wikipedia (CC BY-SA)
Rapid transit
High-capacity public transport
Rapid transit or mass rapid transit (MRT) or heavy rail, commonly referred to as metro, is a type of high-capacity public transport that is generally built in urban areas. A grade separated rapid transit line below ground surface through a tunnel can be regionally called a…Source: Wikipedia (CC BY-SA)