Made famous by 'Star Wars,' these troglodyte homes face an uncertain future.

A collection of fading fantasy tchotchkes lines this dirt road in the Colorado wilderness.

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Thousands of volcanic rocks carved 1,000 years ago.

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

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

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

These ruined Incan mausoleum towers still bear carvings of sacred animals on their blocks.

Mysterious "dots" seen from a satellite in southeast Peru.

Mystic Incan rock piles three miles above sea level.

Ancient Peruvian fertility temple or modern money-making hoax? Either way these monoliths still look like penises.

A fascinating little museum all about the rich history of Peru’s famous plant.

This set of mysterious petroglyphs in the Peruvian jungle could shed light on centuries-old activities in the region.

A kitschy Italian medieval-style castle incongruously located amidst one of the most historic towns in the Peruvian Amazon.

This small oxbow lake has rare giant river otters and some Seussian-sounding birds.

The depictions of slaughter are surprisingly detailed at this mysterious ancient site.

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

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

Pre-Incan aqueduct amidst a stone forest in Peru.

The shockingly unspoiled Peruvian tomb of the Lord of Sipan was once guarded by a footless warrior.

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

Now containing the bones of the actual conquistador, instead of someone else.