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

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

This midcentury chapel is a bold architectural statement and a symbol of Indiana's Lutheran heritage.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.

This former Indiana quarry has been transformed into a park and SCUBA site where divers can explore the drowned mining equipment.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

143 feet of leaping muskie whose mouth can be used as a wedding venue.

A large circus museum with summer performances.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

This award-winning men's bathroom was just too beautiful to not allow women to see.

This replica of the Greek structure is in the heart of Nashville.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

This boulder stays on its mountain thanks to a huge chain and on the map due to local legend.

Moonbows over Kentucky.

One of the few surviving "Wigwam"-themed motels.

The world's longest known cave system.

What remains of the simple red brick chapel where the women's rights movement began.

A tribute to Ponce de Leon's supposed quest for eternal youth.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

Island where motor vehicles are banned -- home to the only carless highway in the United States.