The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

An ancient octagonal weather station named for the eight Greek gods of wind.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

The sophisticated hydraulic system of the Nazca civilization.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

This metal tower in the desert provides views of a handful of Nazca geoglyphs.

Visiting dignitaries and Hollywood stars once stayed at this 1920s hotel, alongside ghosts that are said to haunt its corridors.

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

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

This stone complex marks the urban center of a lost civilization.

Did Inca children also slide down these smooth rocky slopes above Cusco?

The remains of what was the most important religious complex in coastal Peru for over a millennium.

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

With nearly double the depth of the Grand Canyon, this Peruvian canyon is one of the deepest in the world.

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.

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

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 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.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.