One of the most exquisite Lycian hilltop citadels in Turkey.

A beautiful 19th-century Armenian mansion is preserved above an unassuming cafe.

At this ancient settlement at the foot of Mount Babadağ, honeycomb tombs are carved into a round cliff.

One of the largest wooden constructions in Europe was meant to be a casino, but soon became an orphanage.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

Fantastic lake on the heart of a fault line.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

Mausoleum and Holy Seat of Antiochus I of Commagene.

A Turkish monastery tucked into a cliff wall.

This famous city eluded concrete detection until the early 2000's.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

This unimaginably large pile of sand near Nazca is one of the tallest dunes in the world.

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

A jungle cave in Peru of unknown depths, otherworldly sounds, and strange nocturnal birds that navigate by echolocation.

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

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

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

The world's fifth tallest waterfall is a spectacular silver chute of water that cuts through the cloud forest in northern Peru.

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

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

One of the world's tallest waterfalls wasn't revealed to the world at large until 2006.

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.