All he had to do was get to that upper tunnel.

Never went very deep, but the upper tunnels are still holding up with nary a crack.

There were no Cardassians to be seen, but she heard phaser fire and screams coming from some of the upper tunnels.

Roberta watched as the entire class, perhaps on a field trip of some kind, disappeared into one of the upper tunnels.

She asks also that the place be away from the forest, as the old root systems make digging the upper tunnels difficult.

The blast in the upper tunnel had failed in its work.

They've already broken through into the upper tunnels.

There was enough light along the upper tunnel for them to see smooth dirt walls, and then the tunnel opened out suddenly, abruptly.

Mechanical iron hatches were installed, along with the electric railway into the upper tunnel.

Then Jack mounted the table, leaned into the upper tunnel, and listened.