![Sila Tunnel](https://c1.vgtstatic.com/thumb/1/3/134548-v1/sila-tunnel.jpg)
© Google Maps
![Selvåg Tunnel](https://c1.vgtstatic.com/thumb/1/3/134717-v1/selv-g-tunnel.jpg)
© Google Maps
![Central Artery/Tunnel Project (a.k.a The Big Dig)](https://c1.vgtstatic.com/thumb/8/3/83833-v1/central-artery-tunnel-project-a-k-a-the-big-dig.jpg)
© Google Maps
![Nordmannset Tunnel](https://c1.vgtstatic.com/thumb/1/3/134186-v1/nordmannset-tunnel.jpg)
© Google Maps
![Brooklyn–Battery Tunnel](https://c1.vgtstatic.com/thumb/1/3/134340-v1/brooklyn-battery-tunnel-1.jpg)
© Google Maps
![Tennflåg Tunnel](https://c1.vgtstatic.com/thumb/1/3/134481-v1/tennfl-g-tunnel.jpg)
© Google Maps
![Clem Jones Tunnel](https://c1.vgtstatic.com/thumb/1/3/134124-v1/clem-jones-tunnel.jpg)
© Google Maps
![Svartholla Tunnel](https://c1.vgtstatic.com/thumb/1/3/134283-v1/svartholla-tunnel.jpg)
© Google Maps
![Mount Victoria Tunnel](https://c1.vgtstatic.com/thumb/1/3/134228-v1/mount-victoria-tunnel.jpg)
© Google Maps
![Old tunnel](https://c1.vgtstatic.com/thumb/5/9/59824-v1/old-tunnel.jpg)
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![East portal of the Galleria Giovanni XXIII tunnel](https://c2.vgtstatic.com/thumbll/2/8/28144-v1/east-portal-of-the-galleria-giovanni-xxiii-tunnel.jpg)
© Bing Maps
![Tunnel under the edge of an airport runway](https://c1.vgtstatic.com/thumb/1/1/11536-v2/tunnel-under-the-edge-of-an-airport-runway.jpg)
© Google Maps
![Tunnel in Monaco](https://c1.vgtstatic.com/thumb/5/8/5889-v1/tunnel-in-monaco.jpg)
© Google Maps
![Fort Pitt Tunnel](https://c2.vgtstatic.com/thumbll/4/4/44717-v1/fort-pitt-tunnel.jpg)
© Bing Maps
![Chesapeake and Ohio Canal Paw Paw Tunnel, South Portal](https://c2.vgtstatic.com/thumbll/1/4/14022-v1/chesapeake-and-ohio-canal-paw-paw-tunnel-south-portal.jpg)
© Bing Maps
![Entry of St. Michael's Cave](https://c1.vgtstatic.com/thumb/2/2/22222-v1/entry-of-st-michaels-cave.jpg)
© Google Maps
![Mule Mountain Tunnel](https://c1.vgtstatic.com/thumb/2/7/2730-v1/mule-mountain-tunnel.jpg)
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![Autostrada tunnel construction](https://c1.vgtstatic.com/thumb/1/0/10813-v1/autostrada-tunnel-construction.jpg)
© Google Maps
![Lockheed Martin's Low Speed Wind Tunnel](https://c1.vgtstatic.com/thumb/1/5/15096-v1/lockheed-martins-low-speed-wind-tunnel.jpg)
© Google Maps
![Box Tunnel - west portal](https://c2.vgtstatic.com/thumbll/3/4/34564-v1/box-tunnel-west-portal.jpg)
© Bing Maps
![Dublin Sea Port Tunnel (north end)](https://c1.vgtstatic.com/thumb/1/6/16430-v1/dublin-sea-port-tunnel-north-end.jpg)
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![Oslofjordtunnelen (Oslofjord Tunnel), East Entrance](https://c1.vgtstatic.com/thumb/1/2/12239-v1/oslofjordtunnelen-oslofjord-tunnel-east-entrance.jpg)
© Google Maps
![Highway tunnel](https://c1.vgtstatic.com/thumb/5/0/50377-v1/highway-tunnel.jpg)
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![Caldecott Tunnel, Southern Exit](https://c1.vgtstatic.com/thumb/1/4/14400-v1/caldecott-tunnel-southern-exit.jpg)
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![Railroad tunnel east Madagascar](https://c1.vgtstatic.com/thumb/2/3/23123-v1/railroad-tunnel-east-madagascar.jpg)
© Google Maps