The oldest metro in the world, though, is the London Underground, which opened in 1863.
Dating the rocks in London doesn't tell you the age of the London Underground.
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Those represented include BAE Systems, Rolls-Royce, the London Underground and the English Premier League.
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On July 7, 2005, al Qaeda suicide bombers killed dozens on the London underground system.
It is about a 30-minute ride from there to Stratford on the London Underground.
There are also concerns over passport document fraud following the London Underground bomb attacks.
There were also problems on the London Underground's Jubilee Line because of signal failure at Neasden.
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In the longer term, emissions will be cut by switching the London Underground to renewable energy.
TfL said it planned to introduce the technology to the London Underground Tube system at a later point.
Take the one big issue that the pre-election skirmishing has already thrown up the future of the London Underground.
Jon James, executive director of broadband at Virgin Media, said the London Underground wi-fi had been "an incredible success".
Other recommendations include the London Underground running later on Friday and Saturday nights, and the implementation of a 24-hour Crossrail.
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All three bombs on the London Underground system exploded within 50 seconds of each other at around 0850 on Thursday.
The London Underground makes getting around easier and it is possible to enjoy London on even the tightest of budgets.
Artist Mark Wallinger has unveiled his labyrinth design for artworks to be displayed at every station on the London Underground.
The problem with HS2 for Ealing, in west London, was the line followed the route of the London Underground Central Line.
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Big Breakfast presenter Denise Van Outen has shot her first feature film role - playing a flirt on the London Underground.
Striker Danny Wright is a joiner, centre back Matt Langston is a postman and left-back Gareth Gwillim works on the London Underground.
There was the expected May Day trouble, the London underground dispute and, now, a possible flare up in the Geoffrey Robinson affair.
The London Underground plays classical music in some stations to create a more crime-free environment, says a spokeswoman for transport for London.
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Reports of overcrowding on the London Underground were precious few and big crowds arrived and departed from Olympic Park with little drama.
Train carriages could be bomb-proofed to prevent a repeat of the carnage left by the London Underground terrorist attacks, researchers have found.
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Investigators found on Mr Zazi's laptop specifications for triacetone triperoxide (TATP), the explosive used in the 2005 bombings on the London Underground.
The London Underground will soon be deploying a version of this system.
The British Transport Police, which patrols trains and the London Underground says a substantial portion of the pickpocketing is done by these organized groups.
It would be as disastrous for the London Underground to separate management between infrastructure and operations as it has been on the heavy-rail network.
He also attempted to take a grand piano on the London Underground, and persuaded a crowd of tourists that Nelson's Column needed holding up.
The first clues came from the wreckage of the London Underground.
He said his design, with its use of curves and new angles, might be too radical a change for those responsible for the London Underground Map.
BBC: London Underground map gets curves in lecturer's design
Traditional Gypsies, such as those who can be found begging with child on hip in the London Underground, are mostly from Romania, the descendants of freed slaves.
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