Mystic Incan rock piles three miles above sea level.

This 16th-century monastery was founded to cloister the daughters of wealthy local families.

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

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

A Christian monastery stands on what was once a holy Incan temple.

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

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

Sleep in a glass pod dangling off a cliff.

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

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

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.

In the upscale neighborhood of Miraflores in Lima, a pretty little park is home to dozens of cats.

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

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.

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

This archaeological museum in one of Peru’s most intriguing regions exhibits ancient artifacts from the Nazca civilization.

The sophisticated hydraulic system of the Nazca civilization.

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

A section of the long chain that blocked enemy ships from entering Constantinople.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

The ornate miniature mansions were built for Istanbul's feathered residents.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Ancient serpentine sacrifice holder that has stood the test of time.

One of downtown Berlin's last reminders of its Communist past.