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  2. Erdstall - Wikipedia

    en.wikipedia.org/wiki/Erdstall

    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.

  3. Palestinian tunnel warfare in the Gaza Strip - Wikipedia

    en.wikipedia.org/wiki/Palestinian_tunnel_warfare...

    This page is subject to the extended confirmed restriction related to the Arab-Israeli conflict. An Israeli soldier overlooking an uncovered Palestinian tunnel in the Gaza Strip during Operation Protective Edge, 2014 A vast network of underground tunnels used for smuggling and warfare exists in the Gaza Strip. This infrastructure runs throughout the Gaza Strip and towards Egypt and Israel, and ...

  4. Subterranea (geography) - Wikipedia

    en.wikipedia.org/wiki/Subterranea_(geography)

    Subterranea are underground structures, both natural (such as caves) and human-made (such as mines). [1] ... Smuggling tunnel; Tunnels (street tunnel, train tunnels)

  5. The ‘Gaza metro’: The mysterious subterranean tunnel network ...

    www.aol.com/gaza-metro-mysterious-subterranean...

    The myriad tunnels under Gaza are best known as passageways used to smuggle goods from Egypt and launch attacks into Israel.. But there exists a second underground network that the Israel Defense ...

  6. Underground construction - Wikipedia

    en.wikipedia.org/wiki/Underground_construction

    Underground construction has a number of unique risks and challenges but shares a lot with traditional construction and mining. Underground construction workers often work under reduced light condition, in dangerous spaces, and are at a high risk of exposure to contaminants, fire, and explosions.

  7. Hidden tunnel network found at abandoned 800-year-old home in ...

    www.aol.com/news/hidden-tunnel-network-found...

    A section of the hidden tunnel network at the 800-year-old home. Archaeologists also uncovered a water well with a depth of about 40 feet. A photo shows the view into the well.

  8. List of longest tunnels - Wikipedia

    en.wikipedia.org/wiki/List_of_longest_tunnels

    Longest tunnel of the Central Yunnan Water Diversion Project [93] Railway Twin Tube Mont d'Ambin Base Tunnel: Cottian Alps, France/Italy 57,500 m (35.729 mi) 2032 [94] Part of the Lyon–Turin high-speed railway. Reconnaissance tunnels under construction since 2002; construction of main tunnel started in 2016. [95] Railway Twin Tube Brenner ...

  9. The myriad tunnels under Gaza are best known as passageways used to smuggle goods from Egypt and launch attacks into Israel. But there exists a second underground network that the Israel Defense ...