A downtown park built on top of unclaimed graves.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

Just below the surface, shrimp are producing temperatures hotter than the sun.

All that remains of one of the Civil War's more deadly POW camps is a simple flagstone.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

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

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

One of the oldest living oak trees in the Southeast.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Gutted airplanes slowly decay in a Florida field.

A monument celebrating the idea of reaching inaccessible places.

The snowbirds here are circus sideshow performers.

Manatees congregate around a power plant's discharge canal where the water is especially warm.

Native Americans built this circle of stones, which was used to predict astronomical events.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

Travel through the wholesome amusements of yesteryear at this charming miniature village.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Even in death, he's still your huckleberry.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

The highest bridge in America was built for an almost unnervingly small amount of money.

When ecosystems collide in the arid Southwest.