An abandoned theme park with a strange and tumultuous past.

100 years later, they're still down there.

The highest point in Belgium is a staircase to nowhere.

A trove of century-old litho stones from the Puck Building's printing days were discovered behind a cellar wall, and are now hanging in the store.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

A plaque marks a former safe house on the secret route, now hidden next to a McDonald's.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

This remote island in Iowa was abandoned after being devastated by flood.

The pits used to load the nuclear bombs onto the aircraft that dropped them over Hiroshima and Nagasaki at the end of World War II.

The mysterious headstone of an unidentified bank robber was seen visited, every year, by a woman in black.

When this test site was abandoned, they didn't even bother to take the rocket with them.

A hillbilly theme park that proved so unpopular the land wouldn't even sell on eBay after it closed.

Rusting away on the edge of New Jersey are the remains of a Cold War missile launch site.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

The ghostly remains of what was once the world's richest copper mine.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

A nude beach alongside a washed-out road.

The museum chronicling a treasure hunter's dream, fulfilled.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

Remnants of a storybook amusement park hidden behind a strip mall.

A museum dedicated to the history & joys of the trail & your best chance to see hikers throwing up ice cream.