Right here, members of the Lewis and Clark expedition boiled ocean water to make salt.

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

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

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

This coastal rock formation resembles a churning cauldron at high tide.

This museum is a full-size replica of an original church constructed during the 13th-century.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

See massive fossils that are over 200 million years old in northeastern Arizona.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

A geological mystery on Camelback Mountain.

This striking church was built from a Frank Lloyd Wright design more than a decade after the master architect's death.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

There's nothing creepier than a cemetery next to a clown motel.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

Take in the beauty of the Milky Way at one of the best sites for stargazing in Nevada—a state with some tough competition.

Once a Catholic mission, this small town tucked between the ocean and the mountains is now a magical spot for art and history lovers.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

Members of the Confederated Tribes of Warm Springs still net migrating salmon in the traditional way at this cataract on the Deschutes River.

Bridges, terraces, and replicas of historic structures all built of rock and petrified wood by one man.

The world's last remaining store of its kind.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

The wooden airship was the largest flying boat ever built.

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