Fortified homes of highland warriors that are still in use today.

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

This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

A jagged silhouette of shamanistic stone heaps rises from the shore of this dazzling mile-high lake.

An institution dedicated to curiosity, logic, riddles, and Mongolia's long history of puzzles.

A hike outside of the town of Zuun Mod will take visitors to a monastery complex steeped in Mongolian history.

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

A reproduction of earth's many biomes.

Brace yourself for the slowest, scariest, most spectacular drive, down the Drakensberg Escarpment.

A South African bar inside a hollowed out 6,000-year-old Baobab.

Unexplained bald patches in the landscape grow and recede over time, as though they are somehow alive.

Nature’s skyscraper launches out of the terrain with attitude.

Napoleon’s home in exile, decorated with poisonous wallpaper.

One of the world’s largest and deepest freshwater springs, where mastodons once roamed.

This fairytale-inspired cottage was created by a university literature professor.

A charming Amazigh village carved into a mountaintop.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

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

The forbidden island of the Tuscan Archipelago may still contain buried treasure.

Take a giant yellow bird cage to the top of Elba's highest mountain.