A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

The abandoned military base looks like a post-apocalyptic wasteland.

A line of disused military bunkers built to defend against Nazi invasion lies hidden on the outskirts of the city.

Nearly three tons of weapons from the Vietnam War still remain in this small, hidden museum.

A cheeky architectural easter egg.

This abandoned five-star hotel is now a five-star urban exploration destination.

This massive underground salt mine now holds a sci-fi theme park in its depths.

This overlooked street light once served as a KGB dead letter box.

Built by prisoners of war, the largest small-scale model ever built includes eight miles of tiny streams that now sit abandoned.

The ghost town where the villagers refuse to leave.

This half-finished "city of toys" was almost Italy's own Las Vegas.

An eerie gravel road full of shards of red bricks leads to the ruins of a deserted factory.

Two planes stand abandoned after the closure of an aircraft-themed restaurant.

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Ride a boat through this magnificent underground world, which now doubles as a theater.

This church carved into the rocks is full of enchanting stone statues.

Abandoned village in Sicily built during the agricultural reforms of Mussolini.

This amazingly preserved Doric temple was abandoned before it was ever completed.

Leveled by an earthquake, this Italian village is now preserved as a massive concrete art project.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

This cavern was used as a hidden hospital and safe house during the Vietnam War.