Nuclear reactor created the plutonium used on Nagasaki.

A 1940s nuclear reactor built to produce plutonium for the Manhattan Project.

During World War II, over 13,000 people of Japanese ancestry were forcibly removed from their homes and incarcerated in this camp in the Idaho desert.

The hallowed remains of a 900-year old Ancestral Pueblo great house.

A large AIDS Memorial Pathway art installation provides a moment for quiet contemplation in this public park.

This sci-fi gazebo located in a Washington power town is made from old bits of industrial electrical equipment.

Take a hike to this remote, scenic tea stop in the Canadian Rockies.

The granite head appears to be deep in thought and half buried in the ground.

Though many were skeptical at first, these animal-specific routes across the Trans-Canada Highway have been a major conservation success.

This 20-foot-tall sculpture is in honor of the herd of bighorn sheep that call Radium Hot Springs home.

In 1909, the steepest and most difficult piece of track on the Canadian Pacific Railway was replaced with a series of spiralling tunnels cut into the mountains.

Fossils, railroads, and waterfalls!

The only road through the heart of Glacier National Park.

Spectacular views await visitors to this lake.

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

Oregon's only closed-basin hypersaline lake, an important stopover for migrating waterfowl, is in danger of drying up completely.

This spectacular fault escarpment, a popular hang-glider launch point, extends some 30 miles long and towers about 2,500 feet over the valley floors to the west.

This beloved roadside attraction welcomes visitors with his signature neon smile.

The arch that celebrated the completion of the Lincoln and Victory highways.

Curiously, this large sporting goods store features 14 wax representations of American presidents.

The colossal cartoon man stands outside a Nevada museum.

What began as a prominent Burning Man art piece is now an iconic symbol of downtown Reno.

This former New Jersey bus now exists as a public art exhibit.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.