![Sydney Harbour Tunnel](https://c1.vgtstatic.com/thumb/1/3/134390-v1/sydney-harbour-tunnel.jpg)
© Google Maps
![Szklary railway tunnel](https://c1.vgtstatic.com/thumb/2/4/241263-v1/szklary-railway-tunnel.jpg)
© Google Maps
![Sævik Tunnel](https://c1.vgtstatic.com/thumb/1/3/134713-v1/s-vik-tunnel.jpg)
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![Sørdals Tunnel](https://c1.vgtstatic.com/thumb/1/3/134321-v1/s-rdals-tunnel.jpg)
© Google Maps
![Sørnes Tunnel](https://c1.vgtstatic.com/thumb/1/3/134676-v1/s-rnes-tunnel.jpg)
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![Sørskar Tunnel](https://c1.vgtstatic.com/thumb/1/3/134269-v1/s-rskar-tunnel.jpg)
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![Søttar Tunnel](https://c1.vgtstatic.com/thumb/1/3/134564-v1/s-ttar-tunnel.jpg)
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![Tai Lam Tunnel](https://c1.vgtstatic.com/thumb/1/3/134365-v1/tai-lam-tunnel.jpg)
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![Takayama-Kiyomi road tunnel](https://c1.vgtstatic.com/thumb/1/3/134757-v1/takayama-kiyomi-road-tunnel.jpg)
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![Talgje Tunnel](https://c1.vgtstatic.com/thumb/1/3/134136-v1/talgje-tunnel.jpg)
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![Tate's Cairn Tunnel](https://c1.vgtstatic.com/thumb/1/4/144632-v1/tates-cairn-tunnel.jpg)
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![Ted Williams Tunnel](https://c1.vgtstatic.com/thumb/1/0/103867-v1/ted-williams-tunnel-2.jpg)
© Google Maps
![Ted Williams Tunnel](https://c2.vgtstatic.com/thumbll/1/0/102306-v1/ted-williams-tunnel-1.jpg)
© Bing Maps
![Ted Williams Tunnel](https://c1.vgtstatic.com/thumb/1/0/102305-v1/ted-williams-tunnel.jpg)
© Google Maps
![Tennflåg Tunnel](https://c1.vgtstatic.com/thumb/1/3/134481-v1/tennfl-g-tunnel.jpg)
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![Terrace Motorway Tunnel](https://c1.vgtstatic.com/thumb/1/3/134227-v1/terrace-motorway-tunnel.jpg)
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![Těšnovský tunel](https://c1.vgtstatic.com/thumb/1/3/135614-v1/t-novsk-tunel.jpg)
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![Tetsuo Harano Tunnels](https://c1.vgtstatic.com/thumb/1/3/134257-v1/tetsuo-harano-tunnels.jpg)
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![The "Polly Pipe" or Northbridge Tunnel](https://c1.vgtstatic.com/thumb/1/3/134146-v1/the-polly-pipe-or-northbridge-tunnel.jpg)
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![The Broadway Tunnel (officially the Robert C. Levy Tunnel)](https://c1.vgtstatic.com/thumb/1/3/134240-v1/the-broadway-tunnel-officially-the-robert-c-levy-tunnel.jpg)
© Google Maps
![The Conwy Bypass](https://c1.vgtstatic.com/thumb/1/3/134539-v1/the-conwy-bypass.jpg)
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![The Holland Tunnel](https://c1.vgtstatic.com/thumb/5/0/50238-v1/the-holland-tunnel.jpg)
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![The spiral corkscrew Bragernes tunnel](https://c2.vgtstatic.com/thumbll/6/5/65669-v1/the-spiral-corkscrew-bragernes-tunnel.jpg)
© Bing Maps
![Thorold Tunnel](https://c1.vgtstatic.com/thumb/1/3/134356-v1/thorold-tunnel.jpg)
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![Tiergarten Tunnel](https://c1.vgtstatic.com/thumb/1/6/165638-v2/tiergarten-tunnel.jpg)
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