The clock that sets them all.

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

The stately remains of Llywelyn the Great's mighty fortress.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

What is it about mushrooms that makes people wish they lived inside of them?

The largest earthwork effigy in the world.

Only a handful of these gorgeous historic waterwheels remain but even those are in danger from local unrest.

A 1,500-year-old ghost settlement is slowly fading away.

The closest thing to Mars on Earth.

An ancient Viking village in North America that predates Columbus by 500 years.

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

The mysterious "Candelabra of the Andes" could represent anything from a god's trident to a hallucinogenic plant.

Nazca pilgrimage site covering 370 acres is a popular stop for archeologists and looters.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

Bold contestants slide in a rice paddy behind two charging bulls.

Europe’s oldest natural human mummy.

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

Cold storage for agricultural biodiversity.

A city entirely devoted to illegal gun production.

The world's second largest salt mine, said to have been discovered by Alexander the Great's horse.

Step into the cool deep past and unknown future of who begat who.

This large round boulder is said to emit spiritual power, but it may just be magnets.