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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In 1825, French engineer Marc Brunel started work on the Thames Tunnel, the very first underwater tunnel anywhere in the world. Beset by financial difficulties, frequent flooding and several deaths, the project wasn't completed until 1843.
Metropolitan lineOpened in 1863, The Metropolitan Railway between Paddington and Farringdon was the first, urban, underground railway in the world. An extension from Baker Street to Swiss Cottage in 1868, however, put an end to this claim to fame.
Fritchley Tunnel is a disused railway tunnel at Fritchley in Derbyshire, England, which is believed to be the oldest surviving example in the world. The tunnel was constructed in 1793 by Benjamin Outram as part of the Butterley Gangroad, altered in the 1840s, and remained in use until the railway closed in 1933.
The first tunnel built whose engineer is known was excavated in the island of Samos. The engineer Eupalinos de Megara, built this tunnel in the 530 b.C to supply with water the capital of the island and was, with its 1 km length, considered as one of the three marvels of the helenic world.
Gotthard Tunnel with Italian and German interests. After 10 years of excavation, marked by labour unrest and the death of some 167 workers, the 9.3-mile (15-km) tunnel—then the world's longest—opened in 1882. Thus, the cantons of Uri and Ticino were connected by rail, and…
The Royal Borough has two foot tunnels at Greenwich and Woolwich which are used by 1.5 million people a year to cross underneath the river Thames. From Greenwich, you can use the foot tunnel to walk to Island Gardens on the north of the river for the famous Canaletto view of Greenwich.
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.
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.
Being 25 km long the Laerdal Tunnel i Norway is the world's longest road tunnel - and it is equipped with support and cable ladders from Oglaend System. To ease the drive through the 25 km long tunnel, there is a huge hall every 6 km.
The deepest station is Hampstead on the Northern line, which runs down to 58.5 metres. 15. In Central London the deepest station below street level is also the Northern line. It is the DLR concourse at Bank, which is 41.4 metres below.