Abandoned Engineering

The world's strangest engineering projects that created empty silent cities are explored.

We aim for the stars and find out why unwanted battleship guns allow the United States to gain vital information about the borders of space. We ask how the shattered remains of a secret Nazi base became the first on the path to a new world, with the development of the ground-breaking V2 rocket.

A look at some magnificent bridges that were forgotten in time, like the Goat Canyon Trestle that was half destroyed by a hurricane, while Kinzua Viaduct was destroyed by a tornado.

A look at ships that were once iconic triumphs of the marine engineering world and are now left to rust in a ship graveyard in Maryland that has since been colonised by wildlife.

A look at disused structures that used to be at the forefront of the world's power supply, including Budapest's Kelenfold Power Station and New York's Wardenclyffe Tower.

A look at how a crumbling hill in the Peak District and dunes in California caused the closure of two roads. Plus, a route travelled by the French Resistance closed for good in 2003.