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Auxiliary construction tunnels have been found that were closed after completion. At the end of each tunnel, seating niches have been cut out or the tunnel is widened with a longer seating bench. Type C has multiple horizontal slip passages and there is a round trip tunnel at the end or in the middle that is high enough to walk through upright.
Such tunnels are said to physically link prominent places such as country houses, castles, churches, ancient monuments and other, often medieval, buildings. Legends about the existence of secret tunnels usually involve improbably long subterranean passages, sometimes running under major obstacles such as rivers and lakes to reach their ...
An important medieval German pilgrim route was the Via Tolosana (because the most important town along the way is Toulouse, France). This is one of the four medieval pilgrim routes described by Aimery Picaud in his 12th-century Pilgrim's Guide , used by pilgrims from southern and eastern Europe on the Way of St James to Santiago de Compostela ...
This tunnel network has mainly been used for military purposes. The main construction period of these tunnels lasted from 1575 to 1825. [25] The newest sections of the tunnel network were dug as late as the middle 20th century, built in the Cold War as a shelter for citizens in the event of a nuclear strike on the city. [26]
Will be the longest road tunnel in the world, and also the deepest undersea tunnel, 392 metres (1,286 ft) below sea level. It will also have a 4,100 m (2.548 mi) connection tunnel from Kvitsøy to the main tunnel. Railway Sasson Tunnel [citation needed] Hokkaido, Japan 26,230 m (16.299 mi) [citation needed] 2031 Part of the Hokkaido Shinkansen.
From 1954, North Korea has been boring tunnels to the South. Up until 1990s only four have been found by the South, but civilian tunnel diggers (남굴사) claim that there are other networks of tunnels under the South. [9] There are reports that the North has exported their skill of boring tunnels to Hezbollah in Lebanon and Hamas in the Gaza ...
Artemisio Tunnel (road), double tunnel, under Mount Artemision, 1.40 km 76 tunnels of the A2 motorway (Egnatia Odos), most notably in parts of Epirus and Western Macedonia , combined length of 99 km, the longest of which are Driskos Tunnel 4.6 km, Metsovo Tunnel 3.5 km, Dodoni Tunnel 3.6 km, Kastania Tunnel 2.2 km, Anilio Tunnel 2.1 km
a bridge–tunnel carrying monorail Great Belt Fixed Link: 1997 Denmark Zealand and Funen Great Belt: includes a railway tunnel, bridge–tunnel transition uses natural island Øresund Bridge: 2000 Denmark/Sweden Copenhagen and Malmö: Øresund/Öresund: includes a railway tunnel Shanghai Yangtze River Tunnel and Bridge: 2009 China