Stairs often replace streets on the steep slopes of this old mining town.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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

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

Home of the International Space Hall of Fame.

See massive fossils that are over 200 million years old in northeastern Arizona.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

This is one really big nut.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

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

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

A clear blue swimming hole with hidden caves, still unexplored.

A multi-storied adobe complex has been inhabited for more than a thousand years.

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

A unique geological area spiked with wind-carved rocks that resemble teepees.

Seller of surplus nuclear research materials.

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.

When life gave this firefighter a forest fire, he made a rough-hewn sculpture park using a chainsaw.