An alley covered with 20 years of bubble gum.

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

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

A temple devoted to inner esoteric mysteries located in a California commercial strip.

A tribute to the life and work of the beloved "Peanuts" cartoonist.

With the touch of a button, you can read a randomly selected short story.

Concrete strongholds stand guard over the Golden Gate.

Ride on a fully-restored Nike nuclear-tipped missile elevator from the Cold War.

This lighthouse has been guiding shipping into the Golden Gate since before the American Civil War.

This historic psychiatric hospital is haunted by its chilling past.

This one-block alleyway is stuffed with street art that is colorful, cultural, and intensely political.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

An essential stop before plundering, BYO Cutlass.

A turqoise shack off the side of the road housing "100,000 things you don't need," as their sign out front says; it's filled to the brim with an expansive collection of costume jewelry, activist pins, old postcards, expensive collector's paintings, and so, so much more.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

An overlooked and unassuming engineering marvel.

Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

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

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

Worker-owned cooperative and resource for those looking to lighten their ecological footprint.

Check out a shovel along with your Shakespeare.

San Francisco’s century-old Christmas Tree.

The mysterious large white cross visible from the runway is a memorial to a massacre during Spanish Civil War.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.