A once-glowing grotto at the bottom of Waikapalae Wet Cave.

A Hawaiian stairway to heaven—that you can't climb.

Junkbots and mud babies are the masterpieces in this fantastically sci-fi art museum.

A winding path built in secret on the edge of the continent.

"Would you like your sangria in an IV bag, or straight-up?"

A licentious look into Singapore's past, full of disorderly bric-a-brac and disreputable characters.

Subterranean house made out of a grain silo, located in the Santa Cruz Mountains.

Cambria's most unique B&B features creative surroundings and fantastic food.

Downieville's largest Gold Rush structure still standing has one of the longest bars in California.

Condemned US Navy seaplane control tower turned officers’ club sits atop Yerba Buena Island.

Eclectic collection of dark and macabre antiques.

Factory that once supported an entire company town of 350.

The ruins of the castle that chemicals built.

A fleet of automotive automatons sleep in this otherwise unremarkable urban garage.

An Aladdin's cave of old Silicon Valley tech.

This eatery transports diners to a place that no longer exists: East Germany.

Art from the latest counter-culture; kids who dye their hair blue and believe the future will be a post-apocalyptic water world.

This Japanese treats shop may have been the first business to mass-produce fortune cookies in the United States.

Chevron maintains one “Standard” brand station per state so it doesn’t lose the trademark.

Come for the records, stay for the retro pinball machines.

The only museum of sake in the United States is nestled in an unlikely California college town.

This diner's a kitschy dreamland for anyone whose heart is stuck in the 1980s.

San Francisco Bay's ghost town.

An abandoned, unfinished mansion on grounds strewn with lava rocks.