The blinking light atop the iconic landmark has been sending secret messages for decades.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

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

This quiet park's strange sedimentary spires were named after Kodak's color film.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

A cave's rare beauty held a cavernous secret hidden underground.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

A wealth of pop culture statuary and green chile dishes give this roadside restaurant clout.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

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

Some 2,000 carvings show this rare desert spring has been an oasis for travelers for over a thousand years.

This popular pilgrimage site offers a hole filled with holy healing dirt.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

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

The winter home of thousands of beautiful snow geese and sandhill cranes.

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

This sparsely populated town offers a look back in time.

"I did this all while you were watching TV."

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."