NEW BRIGHTON, Pa. – A backed-up sewer led to a surprising discovery of historical significance in Pennsylvania.. Turns out, a brick tunnel had been hidden since the 1800s under the Merrick Art ...

Turns out a brick tunnel had been hidden since the 1800s under the Merrick Art Gallery. "We are not positive, but we do think it may be related to the Underground Railroad," said Michelle Long ...

A squad of construction workers descend daily under the streets of Baltimore. They labor deep down, in the semi-secret and highly restricted chamber known as the Howard Street Tunnel. The massive ...

A Sound Transit tunneling machine will break through to the future Capitol Hill light-rail station this week, but not before passing under an 88-year-old brick building.

According to York County, Howard Tunnel the oldest continuously operating railroad tunnel in the country. Not only that, it's also one of the oldest tunnels like it in the world.

The brick floor of the Virginia Avenue tunnel has worn away. Water saturation has undermined the ground beneath the track ballast. Its relatively small size makes it a tight squeeze for modern trains.

A brick wall, located in Liverpool city centre that connects Park Lane with Jamaica Street, hides the 200 year-old Wapping Tunnel, the first underground rail tunnel ever built below a city. It ran ...