A wall of chewing gum moonlights as collective art.

Shakespeare has been brought to life in this open air theater for the better part of a century.

Decommissioned experimental solar facilities that pioneered solar energy technology.

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

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The beauty and the beast of hydraulic mining is on full display at this California Historic State Park.

Quite simply the largest tree in the world (by volume).

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

One of the world's largest telescopes, stares into the night sky with two huge mirrors.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

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

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

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

An urban laboratory.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

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

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