Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Visit this playground of waterfalls, caves and sinkholes.

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

This structure among the trees was the result of divine inspiration.

Covered in tens of thousands of coats of paint, this Indiana attraction holds a world record all its own.

This candy shop has been serving up sweets to the Louisville area since the 1850s.

This abandoned cemetery has a dark past of bodies buried over bodies.

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

Bizarre and inspired combination store selling only two items: tires and bibles.

The clothes-washing king doubles as a community center with some unusual features, including an aviary filled with finches.

This Old Testament garden features 100 plants from biblical times.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

The famous bell was secreted away and hidden in a church in Allentown during the British occupation of Philadelphia.

A nostalgic bibliographic gem.

A historic covered bridge, only one of two remaining in North Carolina.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Elvis's own personal tropical hideaway.

Kentucky's anomalous peninsula projecting into the Mississippi River, site of legendary earthquakes and local feuds.

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

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

FDR hoped to find a cure for polio in this Georgia town's warm springs.

A stockpile of childhood lunch pails turned collectibles.

10,500 square feet of pinball housed in former dollar store and home to the last playable "Thunderball."

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.