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

The first mosque in Ghana is known as the "Mecca of West Africa."

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

A circle stone within a stone circle.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

A winding, blood-red tunnel of hardened lava navigable by foot.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

An open-air museum in a mountain valley features works designed to blend in with—and disintegrate back into—their natural surroundings.

A more chill but no less fascinating version of the famous ancient archeological site.

Monkeys lounge around at this 13th century temple.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

Brawny guys rolling around in oil is the oldest regular sporting event besides the Olympics.

A gigantic sculpture garden is packed with innovative oddities.

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

This striking landscape in northern Vietnam contains both geological and archaeological wonders.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

An intricately carved Viking church overlooks a glistening fjord.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

This 600-year-old home seems to defy physics.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”