A beautiful geyser under environmental threat.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

The final resting place of New Orleans' most famous voodoo priestess.

France's most famous cemetery, with some of its most curious tombs.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Northern Ireland's Brobdingnagian stepping stones.

The first declared National Monument in the United States.

A battle between nature and architecture in the Cambodian jungle.

The fairy tale castle of the "fairy-tale king."

On the Oregon coast there is a natural hole that seems to be draining the sea.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

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

The largest island on the great salt lake is home to curious creatures and strange stories.

Dramatic river bend surrounds a natural red-rocked pedestal.

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

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

The drama of nature in full effect in this Nevada State Park.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Death rituals and sacrifice inside a Peruvian megalith.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

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

66,000 pieces of art, donated by one of the world's richest men.