The unbelievably opulent home built for an infamous newspaperman.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

Ten 25-foot-tall, beehive-shaped kilns, abandoned in Death Valley.

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

"Only the devil could play golf here."

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

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

Legends surround this jagged rock formation in the New Mexico desert.

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

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

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

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

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

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

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

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

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

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

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

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.