A forsaken wonder in the middle of the East Side neighborhood.

Ruins of a once-prized railroad station in New York.

This semi-spooky remnant of an abandoned hotel provides fantastic views.

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

In the bowels of a 19th-century brewery lurks a fine-dining restaurant offering an array of themed feasts.

The remains of a failed subway in upstate New York is now an underground graffiti bunker.

For decades, it has disappeared and reappeared as water levels rise and fall.

An antique cemetery in New York, this land is home to any number of famed corpses.

An abandoned tuberculosis hospital moulders on into an uncertain future.

Behold the rickety wooden glory of the world's oldest operating roller coaster.

This jail which was in service for over a century is now open for curious visitors.

The graffitied ruins stand hidden within the Pennsylvania woods.

An abandoned asylum where patients have been forgotten but their possessions remain.

The final resting place for the famed creator and narrator of "The Twilight Zone."

This abandoned iron furnace was one of the first to use coke—a type of high-carbon fuel—to make iron.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A marvel of Byzantine engineering under the streets of Istanbul.

A battle between nature and architecture in the Cambodian jungle.

A church of bones, decorated with 40,000 human skeletons.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.