A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

One of the ghostly stops along Route 66.

Fourteen curious and controversial white bunnies sit in a circle near Newport Beach City Hall.

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

One of the last free public hot springs is decorated with hippie art.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

The so-called "Statue of Liberty of Los Angeles" is on a one mutant mission to keep L.A. weird.

The L.A. Zoo has a secret garden of rare bootleg cycads, a palm specimen dating back 280 million years.

Golden Gate Park's historic collection of plants.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

San Diego's most historic and haunted home.

This traditional garden in the San Fernando Valley doubled for Star Fleet Academy, and is irrigated entirely by wastewater.

The largest drain hole in the world.

World's oldest operating science fiction and fantasy club, once home to Ray Bradbury and L. Ron Hubbard.

The site of murders and Satanic cult gatherings.

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

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

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.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

This ultra-modern home clings to the slope of the Hollywood Hills on a precarious stilt.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

This massive redwood tree has a hole in the base big enough to drive through.

The largest permanent Monopoly board makes one of the longest games even bigger.