A rugged lava field dotted with molds of the ancient pines that were growing when the volcano erupted.

A French valley with forests so lush it was nicknamed "the Small Amazonia of the Pyrenees."

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

The largest wooden building in the world now houses a fascinating collection of aircraft.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

This corn maze so big you may want to pack a lunch, and possibly a flaregun.

The fossilized remains of ancient California redwoods.

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.