One of the largest open-pit copper mining operations in the entire country.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

A reproduction of earth's many biomes.

An eatery for UFO seekers on the Extraterrestrial Highway.

Mysterious meeting place for UFO hunters near Area 51.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

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.

The longest living non-clonal organisms on Earth.

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

An homage to everyone's favorite prehistoric cartoon family.

Ancient pueblos built into the base of a natural canyon wall.

A museum dedicated to the alleged Roswell Incident.

A beautiful geyser under environmental threat.

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

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

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

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

A sharp bend in a dramatic river canyon cut through red rocks.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The first declared National Monument in the United States.

A museum devoted entirely to the rattlesnakes and snake-related art.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.