Massive mounds of golden sand look like a desert landscape randomly plopped in an Arctic forest.

The "Gateway to the Arctic" connects Barrow's indigenous population with the sea and its traditional industry: whaling.

These circular ruins are all that remain of a 17th-century Arctic whaling outpost.

Cold storage for agricultural biodiversity.

This abandoned mining village was predicted to resist decay longer than any other modern human settlement.

This small group of sand dunes manages to pack in a strange rainbow of colors.

Réunion Island's highest point is a 2 million-year-old volcano and a paraglider's paradise.

At the center of an island in the middle of the Indian Ocean is a deep chasm ringed by tall waterfalls.

The runoff from these fiery cliffs sends red water flowing into the sea.

The centuries-old trees lining both sides of this dirt road may become Madagascar's first natural monument.

The ruins of Theodore Roosevelt's beloved ranch stand in a forgotten corner of a national park named after him.

The highest point in Montana is as rugged and singular as the state itself.

A rapidly disappearing glacier filled with extinct grasshoppers, perfectly preserved in the ice.

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

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

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

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

This scenic gorge is named after one of the most famous Bigfoot attacks in pseudohistory.

A three-table eatery sits inside the home-kitchen of a seafood virtuoso in Bangkok's Chinatown.

These passages carved from the Antarctic ice hold strange shrines to the harsh southernmost climes.

Natural time capsule containing an alien ecosystem.

An ice field known for harboring an infamous Martian meteorite turned out to contain the oldest air on Earth.

Naked scientists race around the pole in the frigid cold to try to join Antarctica's exclusive 300 Club.

This stunning mass of ice spans 121 square miles and is still growing.