A giant Troll lurks under one of Seattle's oldest bridges.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

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

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

A bizarre house filled with an astounding array of collections.

The legendary building that needed ghostly approval before being built.

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

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

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

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

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

An enormous, inside-out glass globe built in 1935.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

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.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

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

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

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

A crumbling hospital from the 1850s on Roosevelt Island.

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

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.