The beehive-like buildings of this abandoned resort reside near the border of Mauritania and Senegal.

A recreation of an Old West apothecary full of curios.

This spectacular track has run continuously since 1882.

Colorado's only true geyser is hidden within the San Juan National Forest.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

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

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

One of the notorious Soviet leader Joseph Stalin's many summer retreats.

Inaccessible by foot, Japan's most secluded train station sits in the middle of nowhere.

Camels and crocodiles share the black waters of this stunning Saharan oasis.

An unexpected desert oasis in South America.

A perilous medieval road leading right into the sea.

A schooner, nicknamed "The Unsinkable," with a long history of survival in the Indian Ocean.

A forest of immensely tall and unusually straight oak trees planted nearly 200 years ago to build naval ships that never came to be.

One of the largest, oldest, darkest, quietest motel rooms in the world.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

This museum is a full-size replica of an original church constructed during the 13th-century.

A Frankenstein blend of science and art allows one tree to produce 40 different types of stone fruit.

A ship that lived many lives under many names is now known merely as the "Ghost Ship."

These tiny pine-covered islands have inspired art and poetry for centuries.

An architect transformed this abandoned cement factory into his castle-like workshop.