
Abandoned Engineering
See what became of the HARP gun in Barbados and the Barcroft Observatory in California.

See what became of the HARP gun in Barbados and the Barcroft Observatory in California.

A look at some of the world's most extraordinary forgotten urban areas.

An abandoned prison beneath the water and a tunnel in the heart of a mountain.

Hear how a shifting hill in the Peak District and sand in California caused road closures.

Hear how a shifting hill in the Peak District and sand in California caused road closures.

Learn more about some forgotten power stations and towers, including Kelenfold in Hungary.

Discover more about some once-great triumphs of marine engineering, now left to rust.

Learn more about some forgotten bridges, including Goat Canyon Trestle and Kinzua Viaduct.

See what became of the HARP gun in Barbados and the Barcroft Observatory in California.

A look at some of the world's most extraordinary forgotten urban areas.


The underground base with the power to destroy a nation.

Claustrophobic prison cells that contain a story worthy of international acclaim.

A vast project in the icy wilderness of southern Alaska.

A mysterious top-secret facility, a vast Nazi construction and a deserted cityscape.

Exploring a series of vaults, hidden from view in Edinburgh, Scotland.

Forgotten relics from the defence of America's homeland.

The underground base with the power to destroy a nation.

Claustrophobic prison cells that contain a story worthy of international acclaim.

A vast project in the icy wilderness of southern Alaska.