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

These molds for fiberglass statues have formed an eerie, accidental sculpture park.

This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”

Catch a ride through the Pennsylvania countryside on this historic narrow-gauge railroad.

A bizarre house filled with an astounding array of collections.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

An ancient cave system in Tennessee’s Appalachian foothills converted to a 1,200-person music venue.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

The longest navigable underground river in the United States is home to countless blind and albino animals.

A fire lookout atop a glacial pinnacle is reached by climbing three vertiginous flights of stairs.

A small brick parlor house and artist's studio located in the wilderness is surrounded by imposing suburban palaces.

In the mountains of West Virginia is this perfectly preserved Art Deco train station.

The oldest covered railroad bridge still standing in the United States.

It's safe—and permitted—to walk across these twin natural sandstone arches.

Abandoned bridge hidden deep in the San Gabriel Mountains.

A regular looking rock with an unbelievable history.

The home, museum, and death site of Kodak's influential founder.

An unassuming nature trail winds through dozens of tiny houses built for the wee people.

The tallest bridge in California was constructed for a project that was eventually cancelled.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

Part of a highway network meant to connect Miami to Montreal, this 10-mile stretch of road made from red bricks is still around 100 years later.

Dating to 1793, this is the oldest building in Poolesville.