The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

An extraordinary mixture of natural beauty and man-made phenomena.

The ghost town that ended up on Ebay.

The world's first nuclear power plant is open to visitors looking to role-play a meltdown.

Supposedly Satanic numbers adorn this preserved submarine sail.

See just what life was like in a 19th-century prospecting town.

Train debris from the deadliest avalanche in United States history can still be found in the ravine where so many perished.

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

Come for the speed, leave in love with the desert.

These huge stone ovens in the desert fueled the Nevada silver boom, and may have also been a hideout for outlaws.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

While it is not equipped to peer into outer space this observatory looks like it was built on the moon.

The beauty and the beast of hydraulic mining is on full display at this California Historic State Park.

100-year-old shipwreck you can walk up to at low tide.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

The abandoned personal amusement park of the King of Pop.

Get up close to emus and ostriches, or buy their tasty meat.

Honoring the famed folktale author, this California museum looks like it belongs in the Black Forest.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.