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

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

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 remarkable geological formation resembling a forest made of stone.

These delicate ruins need more tourists to keep them from fading away.

Ain't no party like a ghost town party.

Extraordinary rock formations in open Peruvian fields.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

America's only nuclear missile silo open to the public.

The world's largest military aircraft cemetery.

Hollowed out cedar log tubs set in an ancient towering forest.

The Magical World of George Phar Legler.

A reproduction of earth's many biomes.

Oddly shaped rock formation, misassociated with a nearby utopian community.

A house carved into a rock in the 1940s.

Home to the deepest rift anywhere on Earth.

This massive mushroom has spent centuries eating its way across a huge swath of Oregon.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.