Abandoned Engineering

Featured - A country village hiding a sad secret, a mysterious tower scarred by war, a town decaying in the desert and a railway deep beneath a city.

Concrete channels hidden in a mountaintop forest, a collapsing bridge, a marooned military base and the upright rusting carcass of ship are all featured.

Hidden tunnels that saw a city prosper, a sunken wreck with a remarkable past, a concrete wartime dome and a mysterious cold war building all feature.

A devastated cliff-top ruin, an extraordinary tall tower, a concrete structure stranded at sea and a heavy metal monster in a field all feature.

The programme looks at a mysterious group of rusting ships stranded in an arid desert, and a monstrous defensive line on the snow-covered peaks of the Italian Alps.

An abandoned prison beneath the water, a tunnel in the heart of a mountain, concrete towers hidden in the woods and a rusting coastal relic.

A village ruin, pitted and scarred, a ghostly fleet of ships, a bridge to nowhere hidden in a forest and strange metal structures in a wood all feature.

The remarkable projects include a towering structure with an explosive past, a deserted cityscape, a mysterious top-secret facility and a vast Nazi construction.