This imposing 20th-century castle was abandoned before it was ever completed.

Museum dedicated to "the man who moved the Earth."

A huge wooden clock that is so beautiful its creator was forcibly blinded.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

These massive moving sand dunes have swallowed an entire village and are still on the run.

An abandoned Nazi explosives plant founded by the inventor of dynamite is now an underground museum.

This man-made mound monument was built out of soil from all across the Polish empire.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

A curious collection dedicated to human and animal anatomy and pathology.

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

A colorful Peruvian city of the dead.

These giant mummies are set ominously into a Peruvian cliffside and topped with real human skulls.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

The Uros people live on floating reed islands in lake Titicaca.

Huge stone depressions which may have acted as an Incan agricultural experiment.

An unexpected desert oasis in South America.

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

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

Plundered and left asunder by grave robbers, this ancient necropolis has been painstakingly pieced back together.

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.

A remarkable geological formation resembling a forest made of stone.

Lima’s Museum of Anthropology is lined with thousands of elongated human craniums.