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

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

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

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

An eclectic trailer park retreat in the middle of the California desert.

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

A storybook European village in Berkeley.

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

One of the ghostly stops along Route 66.

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.

The ghost town that ended up on Ebay.

In this century-old literary safehouse, print is alive and well.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

A "Titanic" superfan changed his name to Jack and set up this strange shrine to the blockbuster, complete with Korean food and Tarot readings.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

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

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

A castle that was built stone by stone by an eccentric journalist.

Established in the '60s, a family-owned tropical drink bar founded by Ray Buhen, bartender to the stars.

A strange house built only at night, with rumored mystic inspiration.

The ghostly remains of an accidental sea.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

Olfactory delights in San Francisco's Botanical Gardens.