A beach made of semi-precious green sand on the Big Island of Hawaiʻi.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

A public fountain that spouts "health water" from a nearby spring.

A stunning landscape of bunkers that once stored chemical weapons.

Shakespeare has been brought to life in this open air theater for the better part of a century.

Only known mainland rookery of the threatened Stellar sea lion.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

These century-old beehive-shaped kilns were built to produce charcoal for nearby mines.

Supposedly Satanic numbers adorn this preserved submarine sail.

A few dilapidated structures are all that remain of this deserted former silver mining town.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

This museum glorifies the humble potato.

Home to the deepest rift anywhere on Earth.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

A wall of chewing gum moonlights as collective art.

Nuclear reactor created the plutonium used on Nagasaki.

This nature center has one of the largest collections of native raptors in the Pacific Northwest.

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.

A massive sea stack famous for its appearance in The Goonies.

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

These memorials built by an eccentric bachelor on the side of Interstate 5 cause both wonder and traffic accidents.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

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

This charmingly homemade amusement park has been growing for 40 years.