This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

A striking 12th-century-style castle built on the edge of a cliff.

These abandoned Cold War-era bunkers are now a designated refuge for endangered bat species.

Hidden in the forest are the remains of a former World War II chemical plant.

The world's first jet-powered aircraft were assembled by the Germans in this secret factory in the forest during WWII.

Hidden in the forest are the crumbling, graffiti-covered remains of the factory where most of Germany's explosives were produced during World War II.

A unique bridge with an equally unique view.

An aeronautical-themed resort forged around rusty relics from the golden age of air travel.

Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

Derelict airplane bodies serve as both home and income for three Thai families.