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

Home to the deepest rift anywhere on Earth.

Natural rock water slides hidden in the remote forests of northern Idaho.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

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

Massive crater in central Oregon.

The longest continuous lava tube in Oregon.

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.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

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

The world's first aircraft factory has been hiding inside an automobile plant for almost 80 years.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

A real flying saucer, contracted by the U.S. Air Force.

This sandstone gorge in New York State's Adirondack Mountains is home to waterfalls, flumes, and more.

The only house in Oregon designed by the famous architect, Frank Lloyd Wright.

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

This sprawling bookstore spans four floors and has more than a million books in stock.

This empty Detroit high school was too expensive to maintain or destroy.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

Italian cave with exceptional acoustics and an unsavory history.