A replica of the first public theater built in California.

I Street Bridge is the heaviest swinging center bridge in the United States.

Art Deco stylings conceal the true nature of this bridge.

An alley covered with 20 years of bubble gum.

A deserted hodgepodge of experimental structures designed by nearby university students.

A massive volcanic plug is now a protected area that hosts a number of bird species.

Hidden in the Santa Ynez Mountains off Highway 154, this tiny restaurant once served as a stagecoach stop.

Steep canyon walls hide a forested oasis in the West Texas desert.

The highest point in Texas is capped by a big silver pyramid.

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

The state bird of New Mexico, constructed entirely out of garbage.

The oldest continuously occupied public building in the United States.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

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

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

When ecosystems collide in the arid Southwest.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

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

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

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

These tall, red sandstone pinnacles outside Moab are often forgotten amid their more famous neighbors.