What is the secret tunnel in London?

But, there's a secret tunnel in East London that's even deeper than the Tube, and many Londoners don't know it exists. The Lee Tunnel, also known as the Stratford to East Ham deep tunnel, is 80 metres below the surface, and runs for 4.3 miles. This tunnel is rarely seen by people.



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Beneath London's bustling cities lies a mysterious world of Cold War-era tunnel systems and underground chambers - these number in the hundreds. Many of these are owned by the Ministry of Defense and have never been publicly acknowledged - and until recently authorities remained secretive about them.

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Is there a 10 Downing Street secret tunnel? It is a well-known fact that there is a tunnel that links number 10 Downing Street with number 12, running under number 11. But beyond that, there is no official confirmation of any tunnels under Downing Street itself.

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Beneath London's streets, there's a whole network of tunnels used for the Tube, sewage and water. Out of sight and out of mind, many of the people that walk the streets above them don't know about these hidden gems, as the hustle and bustle of city life continues.

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Our network includes 272 functioning Tube stations, but at least another 40 Overground and Underground stations exist that are no longer used for travel.

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The Greenwich Foot Tunnel runs beneath the river Thames between Island Gardens, on the… Visit Cutty Sark, the fastest ship of its time. Now an award-winning visitor attraction…

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Secret passages, also commonly referred to as hidden passages or secret tunnels, are hidden routes used for stealthy travel, escape, or movement of people and goods. They are sometimes inside buildings leading to secret rooms.

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Located in Big Valley, West Elizabeth, you will find the Hidden Tunnel Points of Interest along the North Western most border. Found not far South West of the Stilt Shack and the Crashed Airship, you will find the Hidden Tunnel tucked along the very border of the map.

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The Kingsway Exchange tunnels, an expanse of 8,000 sq m of passageways several hundred feet below High Holborn, were shrouded in mystery for most of the 20th century with details covered by the government's Official Secrets Act, because of their wartime role as a base for MI6 officials.

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During the Underground days, the Thames Tunnel was the oldest underground piece of the Tube's infrastructure. It was planned to construct an intersection between the East London Line and the Jubilee Line extension at Canada Water station.

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If you're anywhere near as obsessed with subterranean London as we are, you'll be bursting with excitement at the prospect of exploring London's abandoned tube tunnels. These disused stations and platforms spend most of the year in peaceful quiet, but on certain days, tour groups are allowed in to get a look.

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Most notably, Londoners took shelter in the tube during the bombings of the First and Second World Wars. They would also shelter in crypts, their desire to live driving them to wait it out amongst the dead.

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The Metropolitan line is the oldest underground railway in the world. The Metropolitan Railway opened in January 1863 and was an immediate success, though its construction took nearly two years and caused huge disruption in the streets.

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