The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

"Only the devil could play golf here."

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Towering basalt columns, a creation of fire and ice.

The ghostly remains of an accidental sea.

A fake town founded by Western movie stars is now becoming a hip desert community.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A B-17 bomber stands as a memorial to the residents of Tulare County who served in World War II.

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

This abandoned boat was left in place thanks to its rotting beauty.

'Cause the fence start shaking, the earth was quaking.

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

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

Four hundred granite steps were built into this massive rock by the National Park Service.

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

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This giant temperature attraction created some giant electric bills.

The drama of nature in full effect in this Nevada State Park.

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

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

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

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A popular tourist cave with a dark past.