Here is more on the Thames Tunnel, built between 1825 and 1843 by Marc Brunel and his son Isambard Kingdom Brunel, the first tunnel beneath a navigable river in the world. In 1869, the pedestrian tunnel was converted for railway use and operated by the East London Railway, which was later absorbed into the London Underground, which used the tunnel until 1962. The Thames Tunnel today is part of the London Overground rail network’s East London line extension, opened in 2010.
