This tunnel would allow trains to run through the station rather than having to reverse out over the same set of tracks.

The tunnel allowed inhabitants to walk through it undetected, particularly useful during times of siege.

Four tunnels allow access between the seating area and the concourse which runs underneath.

This tunnel would, in theory, join two separate times and allow passage between them.

The tunnel would allow military lorries to travel within the Rock.

These bridges and tunnels for animals allow them to cross the roads we have built through their habitats.

The new railroad line and tunnel allowed ever increasing numbers of tourists to visit Kandersteg.

For this purpose, he constructs a secret tunnel to allow access between his mansion and the house directly behind it.

The tunnel would only be allowing you to get a tunneled connection to the Internet.

One such advantage would be that a tunnel would still allow shipping to pass.