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

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

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

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

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

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.

An unexpected desert oasis in South America.

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.

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

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

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

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The deepest metro station in the world.

340-foot statue built to honour the Heroes of the Soviet Union.

This attraction was abandoned after the Chernobyl disaster.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

"Unity, Creativity, Beauty."

A collection of art from Bulgaria's time as a communist state.

A striking symbol of the Bulgarian capital.

An abandoned saucer-shaped monument in the Bulgarian mountains.

This historic timepiece is thought to be the only public clock in the world that keeps lunar time.

A little sculpture with a large wardrobe.

Climb inside an iron crystal magnified 165 billion times its normal size.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.