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In April, the final breakthrough is expected in the second tube. At 57 kilometers long (35 miles), the Gotthard Base Tunnel will handily outstrip the 50-kilometer (31-mile) Channel Tunnel between ...

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First the peripheral vision goes, and people develop tunnel vision: They have to turn their whole head just to view the world ...

Traditionally, workers built tunnels by digging at either opening of the tunnel and meeting in the middle. But to improve access and reduce construction times Victorian workers often excavated ...

Taking a rail journey invariably means going through a tunnel at some point. Most of the time it's over in a flash, the darkness racing by as quickly as the passing countryside.

Once the show completes you should be able to watch the replay on the video player above, or visit either our Facebook page or YouTube page to view it. The "Tunnel Vision" original theme song is ...