California's own majestic geyser is powered by a subterranean volcano.

This historic California cemetery holds the bodies of veterans of both the Civil War and the Donner Party.

A sculpture dedicated to Napa Valley's oldest mineral water company.

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

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

The strange phenomenon causing gravity to "work backwards" on this hill has been blamed on the paranormal.

The world's only museum devoted to the wonders of fluorescence.

This graffiti-covered bridge is the quintessential vision of a place for disillusioned youth to escape the complexities of burgeoning adulthood.

The only parking meter in the entire town, it is surrounded by 100 free spaces.

A huge collection of rocks, gems, and crystals.

The largest drain hole in the world.

On the Oregon coast there is a natural hole that seems to be draining the sea.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

These aggressively sustainable art homes look like something out of 1970's science fiction.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

A swing to dangle you off the very edge.

Once the site of speeding horses, now home to picnickers and public concerts.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

This shop specializes in oddities and Victorian-inspired wonders.

A cemetery with goat-horn bedecked gravestones.

A fiery crater has been burning in the Karakum Desert since 1971.

Abandoned silver mine strewn with wrecked and twisted structures.