Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

Graffiti, cars, and religion combine to create this jungle of scrap in the Nevada desert.

An optical illusion found amid a logged redwood forest.

This impressive tunnel was dug entirely by hand over the course of 36 years.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

The liveliest ghost town in the state.

A giant 400-acre preserve in North Florida for displaced wolves.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

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

Lucha Libre (Mexican Wrestling) themed taco shop.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

A toxic ghost town sitting atop a massive coal fire.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

Towering basalt columns, a creation of fire and ice.

A renegade art installation in a small Vancouver park is now officially sanctioned by the City Parks Department.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

The only surviving prototype of Buckminster Fuller's revolutionary car.

Experience a charming 1930's version of "infotainment."

The drama of nature in full effect in this Nevada State Park.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

Odd outsider art installations surround a Gold Rush-era ghost town.