The tunnel opened in 1830 and closed on 15 May 1972.

And, indeed, the tunnel opened into the side of a much larger one.

Five tunnels have opened since the turn of the century.

He realized suddenly that the tunnel opened outside the mountain.

The tunnel opened together with the rest of the loop line in 1881.

Somewhere close at hand, the tunnel was opening back into the world without.

A new tunnel, the fastest in the world, will open next year.

Delayed by almost a year, the tunnel finally opened on 7 May 1996.

The tunnel was short and opened into a larger chamber.

A small tunnel opened directly into the side of the mountain.