Believed by many to be the oldest surviving public monument in the United States.

Small rustic cabin nested in the mountains of Killington, Vermont.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

This picturesque Victorian ghost town was once a thriving mill community.

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

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

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

This is why we can't have nice things on the Incan Trail.

It took 82 years and four different plaques to finally get the story right.

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.

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

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

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

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

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

An Inca spa, military outpost or maybe… both?

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

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.

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

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

An unexpected desert oasis in South America.

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

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

Mansion and shopping center used in the 1975 film "The Stepford Wives."