Forgotten and then destroyed by fire, this was once one of the largest saltwater swimming pools in the world.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

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

A ghost town originally established and governed solely by Black Americans seeking a place of their own, free from discrimination.

Experience the glam side of air travel without leaving the ground at this speakeasy.

Where a railroad loops under or over itself to rise or drop more than 70 feet in a short distance.

The hundreds of movies and television shows shot in this high desert town are commemorated in a unique museum.

This rock formation named for its unique shape is one of many that call the Alabama Hills home.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

A modest reminder of treacherous waters at the Golden Gate.

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

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

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

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

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

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

An artsy hidden staircase leads to breathtaking views of San Francisco.

An alley covered with 20 years of bubble gum.

This restaurant's marvelous musical machines include a self-playing violin.

A water tower shaped like a giant coffee pot looms over a small Swedish village in Central California.

The huge granite obelisk that towers over a small California town.

This little slice of the Netherlands in the Pacific Northwest blooms in a rainbow of color each spring.

The classic Atari game's iconic aliens have invaded downtown San Diego.

Local legend has it that an old, decaying staircase outside this cemetery is haunted by dozens of ghosts.