These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

The legendary building that needed ghostly approval before being built.

A 140-year-old castle with underground caves hidden in San Francisco.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Tucked in the back of this amazing antique store is an important piece of medical history.

An emerald-green grotto just a short trip from Austin.

A crumbling hospital from the 1850s on Roosevelt Island.

World's first "penitentiary," meant to be humane, drove men insane.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

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

The cruel trial of a 13-year-old boy inspired the creation of this now abandoned reformatory.