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

An overlooked and unassuming engineering marvel.

A rococo retro-futurist future-rustic vernacular between yesterday’s tomorrow and the future that never was.

A 1920s speakeasy that had rum runners racing up and down the shores of California.

A popular tourist cave with a dark past.

The oldest continuously operating Catholic school west of the Mississippi.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

A library of rare occult books in Los Angeles.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

A defunct all-girls college which may be the resting place of H.P. Lovecraft's real-life Necronomicon.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

This quirky roadside attraction dives into the many theories surrounding North America's most infamous hairy cryptid.

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

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

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

Secret Manor, a house full of legends, the least of which is the haunting of long-deceased ladies of pleasure.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

The last of its kind in the country.

A giant donut stands as a popular symbol of Los Angeles iconography.

A "haunted" landmark on the coast of Southern California.