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

A museum dedicated to the alleged Roswell Incident.

Home of the International Space Hall of Fame.

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

Legends surround this jagged rock formation in the New Mexico desert.

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

The U.S. Air Force has an anti-satellite laser weapon.

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

Albuquerque found the perfect use for tumbleweeds at Christmastime.

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

A walk through the historic city center, under the streets of Seattle.

This former coal gasification plant found a curious second life as a popular public park.

A beautiful final resting place for some of the noteworthy deceased.

The highest point in Washington state is a volcano covered in glaciers.

A miraculous natural phenomenon known as "the spring that breathes."

A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

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

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

The biggest solar telescope in the world helps reveal the secrets of our sun.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

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

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.