Most-visited and most-photographed slot canyon in the American Southwest.

A tunnel with windows, so you don't miss out on the impressive views.

A frozen oasis lies beneath the scorching New Mexico desert.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Catch two 18-foot-tall ranchers mid-brawl as you drive by on Highway 285.

The final resting place of the living embodiment of the famous Forest Service symbol.

This 1950s-era nostalgic roadside New Mexico attraction consists of a quirky curio store and museum embedded into the face of a cave.

A museum dedicated to the alleged Roswell Incident.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

Once one of the largest producers of pig iron in the world.

The Grand Canyon of Texas.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

A Roman-style column in Oregon hides a spiral staircase inside.

You might recognize this historic Oregon mansion from its appearance in 'The Goonies.'

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.

On the Oregon coast there is a natural hole that seems to be draining the sea.

An optical illusion found amid a logged redwood forest.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Once the largest town in eastern Yuba County now sits abandoned.

A fine mixture of the old and the new topped with an art deco neon spire.

Bits and pieces from the ill-fated Donner Party's winter cabins.

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