A museum designed by and dedicated to P.T. Barnum in the town where he is buried.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

A miniature village lies nearly forgotten in the forest by the side of a major highway.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

3/4-scale model of the White House in Atlanta, Georgia.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

A medieval castle in the middle of rural Texas.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Buildings from the fictional planet of Tatooine still litter the Tunisian desert.

The original film set of Luke Skywalker's Tatooine home from the 'Star Wars' trilogy.

The smallest restaurant in the world.

Millions of glowing microscopic organisms light up the waters of this luminous lagoon.

A flooded Mexican cave that hides a river beneath the water.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

The house and graveyard used in the Stephen King spine-chiller.

New York City's first Modernist house.

A once crucial portion of the Long Island railroad still lays abandoned, waiting to be turned into an urban park.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

Nondescript elevator doors open to reveal a stunning, surreal world.

HBO series' stage tucked away in a Greenpoint lot is the largest theatrical set of its kind in the United States.