The world's largest kaleidoscope, designed by a 1960s psychedelic artist.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

An allegedly haunted testament to a local businessman's desire for status, posterity, and charity.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

Eccentric concrete mansion and museum designed and built by hand from the inside out.

Breathtaking and huge 430 year old maps of Italy.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

A museum and shop on Bourbon Street located in the French Quarter.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

The celebrated eyesore created by starry-eyed sweethearts.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

This massive redwood tree has a hole in the base big enough to drive through.

When ecosystems collide in the arid Southwest.

Possibly the world's only drive-in movie theater with an attached motel.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The world's longest known cave system.

A gigantic 10-foot tall stone man.

Surprisingly aquamarine waters fill deep lakes formed at the end of the last ice age.

An architectural oddity hides in plain sight on this iconic London bridge.

Elvis's own personal tropical hideaway.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.