The only accessible avenues are steam tunnels and a small complex of buildings.

I've spent $20 million on deferred maintenance and will only be remembered by people who like to go through steam tunnels.

Right now he was in an steam tunnel somewhere beneath the city streets.

"The door to the steam tunnel could be opened from the other side only with a key," Rafe said.

Her home beneath Central Park was close to the steam tunnels.

The Chancellor, having no other way in or out of the building, used the steam tunnels to escape.

Or the steam tunnel in Manhattan that means you never wrap your fig tree.

You've got a pan down there in the steam tunnel, is that it, Rosie?

The water flushed through the steam tunnels and eventually made its way to Grainger's basement.

Bent sideways, the chimney was more like a steam tunnel here.