This little-known relic crypt holds stolen parts of a Roman Empress.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

Belly up to the bar in Cowtown, don't forget to buy some boots.

Bananas are often left for the first monkey America ever recovered alive after being launched into space.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

Ancient pueblos built into the base of a natural canyon wall.

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

Oddly shaped rock formation, misassociated with a nearby utopian community.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

The oldest U.S. Government building in California, and it's State Historic Landmark #1.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A massive sea stack famous for its appearance in The Goonies.

100-year-old shipwreck you can walk up to at low tide.

A Roman-style column in Oregon hides a spiral staircase inside.

This charmingly homemade amusement park has been growing for 40 years.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

This granite monument at the site of an ill-conceived tourist attraction is built from the same stone as the Mormon Temple.