These three batteries were to be linked with a series of underground tunnels.

Below the building, a series of tunnels and rails connect the many sections.

The worms live in a series of tunnels within and beneath the huts.

The older magician led him through a series of long tunnels to a place in the building he had never been before.

He lives underground in a series of sewers and tunnels.

A series of underground tunnels were used for routing utilities.

In 2009 a series of tunnels was discovered under the building.

The water is transferred from the sea to the plant by a series of shafts and tunnels.

Not five minutes later, another series of tunnels branched off to their right.

Those who died were quietly taken through a series of underground tunnels to the morgue.