These millipedes glow not out of attraction, but as a not-too-subtle warning.

Lucha Libre (Mexican Wrestling) themed taco shop.

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

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

A multimedia experience that chronicles the atrocities of racism.

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

The neighborhood shop is a sort of tiny cactus museum full of exotic specimens you can take home.

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

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

San Diego's most historic and haunted home.

One of the ghostly stops along Route 66.

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

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

A storybook European village in Berkeley.

The site of murders and Satanic cult gatherings.

The remains of a ruined mansion memorialize the 1906 earthquake.

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

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

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

The largest drain hole in the world.

Abandoned bridge hidden deep in the San Gabriel Mountains.

An unfortunate geological resemblance to Satan has labeled this Pasadena gorge as a passage to the underworld.

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