Ruins of a Carnegie family mansion on Cumberland Island.

This Canadian island is a veritable garden of decay with countless abandoned structures dotting the landscape.

The remains of Crystal Palace Great Exhibition of 1851.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

A lonely beacon, precariously perched atop a remote sliver of rock.

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

Hidden in Carnfunnock Country Park is a lasting testament to the Normans who once settled in the region.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.

In northeastern Poland, the ruins of a massive granary overlook the Narew River.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

For those going through a life transition, a place to leave behind a piece of your former self.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.

During the holidays, a vintage subway train whisks New Yorkers back in time.

Edison's cast-in-place concrete houses were a failure, but way ahead of their time.

A market built atop boats is one of the few floating holiday markets in Europe.

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

One of the last remaining covered bridges in the province of Ontario.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

Defying all odds, this lonely little tree found a home on a log sticking out of a Canadian lake.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.