Once a dining hall for boarding school students, this lodge was a popular haunt for nuclear physicists working on the Manhattan Project.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

These unique volcanic rock formations offer the perfect opportunity to camp and hike.

Hidden in the Chihuahuan Desert resides an amazing collection of petroglyphs.

Explore a misty river canyon from a metal bridge system.

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

High in the Sacramento Mountains, a facility dedicated to studying the sun.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

More than 21,000 images fill this overlooked gem of a prehistoric site.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

This massive home was constructed by one of the greatest conservationists in Colorado history.

Inspired by a music box, a small town Vietnam vet carved an entire carousel full of animals by hand.

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

Roaming bison and a spectacular view at the highest point in Nebraska.

A whimsical monument marks the highest point in Kansas, not that you could tell by the looks of it.

Once an ancient sea, this landscape of rocky ravines is filled with the fossils of ancient marine life.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

Walk up a ramp through a forest for panoramic views of Lake Michigan.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

A once grand hotel is being retaken by the wilderness it once capitalized on.