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

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

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

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

Beautiful Victorian buildings from L.A.'s forgotten architectural past.

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

This glamorous old building is said to have inspired the Tower of Terror.

A 300-ship graveyard, with a few still visible at low tide.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

Everyone remembers Laurie Strode from Halloween, but this is the house where most of the blood was shed.

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

Visible below the waves are memorials to the city's Gold Rush dead.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

A modern mechanical planetary system, part of a 10,000 year clock.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

Most famous work of one of Frank Lloyd Wright's sons.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

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

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

A ghost town at the airport is now a refuge for blue butterflies.

Canyon walls shrouded in ferns.