A Cold War atomic camp buried under the ice is now emerging because of global warming.

The world's largest dark sky preserve is a Canadian park established to preserve the country's last wood bison.

The only way to visit this old resort hotel is with scuba gear.

Climb right into the heart of this colorful Iceland volcano.

This Elizabethan hedge maze is one of only six in North America.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The world's most active stratovolcano is almost always erupting.

The highest peak in Northern Ireland is topped with a stone tower and haunting burial mounds.

Home to some of the oldest hominid fossils ever found.

The largest stone moai on Rapa Nui.

A fiery crater has been burning in the Karakum Desert since 1971.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

Ancient artists in the middle of nowhere.

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.