The oldest U.S. Government building in California, and it's State Historic Landmark #1.

The first safe in this California town had to hold all the gold.

Concrete strongholds stand guard over the Golden Gate.

The first Russian Orthodox church in North America and an Alaskan landmark.

The first declared National Monument in the United States.

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

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

A beautiful geyser under environmental threat.

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

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

Small Nevada town embraced its designation as the "Armpit of America" with an Old Spice-sponsored festival.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

Despite its name, this route in southern Utah offers a heavenly day trip.

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

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

Oddly shaped rock formation, misassociated with a nearby utopian community.

This historic national park is covered in the stunning ruins of red rock pueblos.

The cinder cone volcano with a less than complimentary name.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

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

These huge stone ovens in the desert fueled the Nevada silver boom, and may have also been a hideout for outlaws.

This crumbling stump is all that remains of what was once thought to be the oldest living organism.

The longest living non-clonal organisms on Earth.