The former home of the 11th president of the United States.

Once one of the most polluted caves in America, now an environmental success story and a museum dedicated to caves.

Prehistoric animals decorate this popular outdoor park.

The remains of this visionary community can still be found much as it was a century ago.

The world's largest rotating world.

The body of one of the world's most famous outlaws is covered in cement and iron to prevent it from being stolen.

The remnants of Peoria's proud baseball past stand slightly abandoned, but not forgotten.

One of two identical monuments marking the sites of military training encampments in Peoria, Illinois.

This rare female version of the Muffler Man has its clothes removed each summer to signal the start of pool season.

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

The world's second largest rocking chair is found on Route 66 in Cuba... Missouri.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

The seventh largest spring in the world.

This one-room schoolhouse in rural Arkansas dates to the 1920s, but looks like it could be the 1820s.

The warmest cave in the Ozarks features two seemingly bottomless lakes.

Giant papier mache hog sits on private property.

One of the oldest show caves in Arkansas.

This statue is an ode to an iconic roadside advertisement popularized during the 1970s.

This monument marks the point where Oklahoma, Kansas, and Missouri intersect.

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

People of the Plum Bayou culture built these enormous mounds over 1,000 years ago.

A short boardwalk through a swamp leads to the spot from which the Louisiana Purchase was surveyed.

This statue of the "father of television" stands prominently in the United States Capitol.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.