Most-visited and most-photographed slot canyon in the American Southwest.

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

At this gas station in the middle of the desert, a convenience store has been carved directly into the rock.

The water swaps direction twice a day, whipping into a frenzy of whirlpools and rapids.

Hundreds of tree trunks and Welwitschia flowers populate this living fossil haven.

This road winds through the steep coastal cliffside offering spectacular views for those who brave the drive.

This small monument marks the divide between the Atlantic and Indian Oceans at the southernmost tip of Africa.

An ancient Incan convent on Lake Titicaca's Island of the Moon.

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

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

Every Sunday, Bogotá turns 75 miles of its city streets into a bicycle superhighway.

The colonial city's social history is reflected in its fanciful door knockers.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

The world's second-largest sundial, made entirely out of stone.

Hidden in the shadow of a rocky fortress is one concubine’s long-forgotten legacy.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.

A sprawling nature preserve harbors the world's only living dragons.

The oldest inn in England served brew to the crusaders.

Follow the original medieval paths that wind through this intriguing section of the city.

A geological mystery on Camelback Mountain.

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

Bootleggers ran booze beneath this building before (and after) Route 66 appeared beside it.

Odd outsider art installations surround a Gold Rush-era ghost town.