Traditional 11th-century outdoor tannery.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

Of five volcanoes located in the massive Tengger caldera, this cone is the youngest and most active.

This massive complex is made up of hundreds of smaller temples that date back to the ninth century.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

A mud brick kasbah with a history of lavishness and traitorship.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

Mosaics, storks, and brothels—this ancient city has it all.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

A sprawling Victorian farm that has been surrounded by a capital city is one of Canada's greatest treasures.

These locks on North America’s oldest canal are named after a porcine rock formation.

This railroad magnate's 19th century tower is more than a little bit out of place in the Nevada desert.

The ruins of a medieval monastery named after a type of tree.

A hugely vast Irish landscape of barren rock that stretches for miles.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

The ancient tomb acts as a calendar that keeps perfect time.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

A mile-long navigable cave adorned with stalactites and stalagmites reaching up to 65 feet tall.

This crumbling industrial fortress has attracted daredevils, filmmakers, and historians.

As you overlook the Howe Sound and the town of Squamish, your breath will be taken away by its beauty or the stairs... probably all the stairs.

The first transatlantic wireless signal was received at this 17th-century fort.

Twice a day, the water of the Petitcodiac River flows upstream in a surfable wave.