The man who was president for only one day and spent most of it asleep.

This grassy field marks the site of a surprising religious conflict.

At a mile long, the Fort Madison Bridge is the largest double-decker swing-span bridge in the world.

The site where Joseph Smith, founder of the Latter Day Saint movement, was killed by a mob.

Over 120 years ago, the original boardgame that inspired Monopoly was invented in this small Illinois town.

This Mediterranean castle was built for a millionaire and his giant dog.

In Edwin Hubble's hometown, a scale model of the groundbreaking telescope that was named in his honor.

A historic and oft-filmed prison stands in a Chicago suburb.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

A chessmaster's dream destination.

Less a museum than a bizarre fantasy world created by artists and engineers.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

Everything good comes from Uranus

Massive still life just off the highway in Kansas.

Salina's eye-catching giant mural depicting children at play is painted atop a century-old mill elevator.

This vivid painted ceramic sculpture evokes the expansiveness of the prairie sky.

From this scenic rockface, you can still see the paths Western pioneers followed.

Named for a prominent scout and explorer, this Wyoming state park encompasses a replica of an 1840s trading post, a 19th-century Army outpost, and early 20th-century automobile lodgings.

A sandstone canyon wilderness with a history of outlaws, mysterious disappearances, and a UFO encounter.

This ancient settlement contains some of the largest earthen mounds in North America.

One of the best-preserved Native American mounds remaining in the southern United States.

Memorials are nearly all that remains of this Arkansas prison camp, where thousands of Japanese Americans were forcibly relocated during World War II.

A 19th-century perch for spotting sailing ships now boasts one of the most iconic views in the Southern Hemisphere.