Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

Exact replica of the ancient monument, but much, much lighter.

Shop of curiosities with a dinosaur museum tucked in its basement.

One of the ghostly stops along Route 66.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

This float factory takes the mask off of Mardi Gras and lets visitors see where the magic happens.

Where monkeys run wild and the humans are caged.

In Florida, these naughty monkeys live on their own mini-monkey Alcatraz.

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

A piece of outsider public art accompanied by a strange urban legend.

A unique attraction and museum dedicated to exploring iconic roadside structures.

Mysterious glowing orbs float through the desert night.

The only Florida state park with publicly accessible caves.

A Prada store in the West Texas desert that is never open for business.

America's oldest archaeological site or a muddled case of wishful thinking.

A shrine to a skeleton saint in the city of angels.

An abandoned water sports stadium that has become a haven for graffiti and decay.

This shop and studio is dedicated to the art of the book, from letterpress to bookbinding.

The oldest surviving botanic garden in the United States.

A Memphis park where you can walk the whole Mississippi River in one go.

Fourteen curious and controversial white bunnies sit in a circle near Newport Beach City Hall.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.