One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

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

The only road through the heart of Glacier National Park.

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

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

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

Home of Howard Hughes' Spruce Goose.

Towering basalt columns, a creation of fire and ice.

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

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

The museum is housed inside the historic 1863 Carson City Mint.

The ruins of a military outpost from the 1860s form the centerpiece of a Nevada state park.

This natural marble cave is one of only five national monuments in Oregon.

The longest continuous lava tube in Oregon.

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

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

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

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

The flow from this waterfall sometimes comes out of springs below its rim.

At the edge of the high desert, California's second-largest natural lake is home to a unique subspecies of trout adapted to its alkaline waters.

A showcase of engineering might that was also symbolic of westward expansion.

This museum looks at the history of one of America's most famous prisons and most beloved albums.

The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California."

California's oldest existing theater building hosted an impressive cast of celebrities, including hosting Mark Twain's first lecture.