These WWII-era murals were initially booed as a libelous portrayal of the American dream but have survived multiple attempts to have them destroyed.

Guns that have been defending San Francisco since 1904.

A Barbary Coast watering hole built into a Gold Rush shipwreck.

Golden Gate Park's historic collection of plants.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

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.

San Francisco's newly reopened hands-on science museum.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Dive bar built out of the remains of a whaling ship.

A playground built by the kids that is a child's wonderland, and a helicopter parent's nightmare.

Odd stone and concrete monuments in the "Poet of the Sierras" eclectic folly garden.

Spiral labyrinth hidden in the hills above Oakland, CA.

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

This 19th century train workshop is a treasure trove of railroad history.

Eastern zen meets Western grit in these four little trees growing out of a rock on Lake Tahoe’s Nevada shore.

One woman's Viking Castle on Lake Tahoe.

California's oldest existing theater building hosted an impressive cast of celebrities, including hosting Mark Twain's first lecture.

Hidden in a hotel parking lot is a strange historical plaque erected by an obscure fraternal society.

The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California."

A fine mixture of the old and the new topped with an art deco neon spire.