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

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

An inconspicuous footbridge beloved by San Diego locals.

The site of murders and Satanic cult gatherings.

A modern day curiosity cabinet.

A meditative space out of a fantasy story.

A storybook European village in Berkeley.

The remains of a ruined mansion memorialize the 1906 earthquake.

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

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

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Sister store to the Echo Park Time Travel Store.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

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

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

An essential stop before plundering, BYO Cutlass.

Canyon walls shrouded in ferns.

Explore 10 acres of environmental sculptures.

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

"Looks so real, it's scary!"

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Quite simply the largest tree in the world (by volume).