This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

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

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

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

A museum dedicated to the alleged Roswell Incident.

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

The shattered remnants of a meteor that struck Santa Fe more than a billion years ago.

The most powerful laboratory radiation source in the world pulses with 1,000 times the electricity of a lightning bolt.

This mesmerizing medieval monastery-cave complex sits thousands of feet above ground overlooking a valley.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Limestone caves with spectacular showcase chambers.

Collection of vintage trailers double as hotel rooms.

A spiritual vortex among the red rocks in Sedona.

One of the largest, oldest, darkest, quietest motel rooms in the world.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

The only diamond mine in the world where you can keep what you find.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

Natural time capsule containing an alien ecosystem.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

The fossilized remains of ancient California redwoods.

Ancient human, animal, and geometric figures drawn in the earth.

Massive prehistoric mammals used these stones as oversized scratching posts.