He wondered whether the tunnel connected to the house, or if there was another way out.

Maybe the tunnel did connect with what is now the cliff.

It's a big rock with great tunnels connecting the buildings.

There was no tunnel connecting the door with the terminal.

In the 1970s these tunnels connecting the different parts of the building were sealed.

A tunnel connects the south and north sides of the tracks.

At around 11:00, he led them through the tunnel connecting the generators to the position.

There are also various tunnels connecting the interior world with the surface.

There used to be a tunnel connecting the waiting room to the platforms.

A tunnel connects the main building to a nearby cabin.