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

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

Historic marionette theater features thousands of handmade puppets and free cups of ice cream.

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

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

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

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

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

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

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

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

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

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

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

Canyon walls shrouded in ferns.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

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

The ghostly remains of an accidental sea.

One man's vast collection of artifacts and ephemera from matchbooks and postcards to vintage neon signs and cars.

A hotel and restaurant serving as the mecca of kitsch.

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