A sculptor's dream castle turned fantastical ruin.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.

A one-ton statue of Steve Rogers beautifies the entry to a Brooklyn Bed, Bath & Beyond.

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

Rock face that shares a name with Mary Shelley's famous doctor.

The most beautiful Taco Bell in the world even has surfboard parking.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

Natural rock water slides hidden in the remote forests of northern Idaho.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

Yugoslavia's biggest underground airport lies in ruins.

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

Crammed inside this grounded passenger plane is a bar that was once a Communist hang out and is now a ratty relic.

A massive, abstract lookout tower providing a panoramic view of Prague.

An army of sleeping knights sculpted by a self-taught local artist beautifully depict an old Czech legend.

This Czech military museum is home to pink tank that was once a symbol of art and political rebellion.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

This former quarry is now a picturesque gorge that hides a sunken lake.

Thirty creepy ghosts now inhabit this decaying 14th-century church.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

Two monstrous faces loom over a village in Czechia.