The world's longest known cave system.

Modern sundial uses ancient methods to tell time and date perfectly.

A sacred well steeped in Pagan roots on the West Coast of Ireland.

A local scoured more than 1,000 acres for stone to create his masterpiece.

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

Prehistoric animals decorate this popular outdoor park.

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

The lowest point in the state of Illinois, at the confluence of the Mississippi and Ohio rivers.

Even with its slightly risible name this colossal cross is still able to inspire awe.

Taxidermy, Cigar Store Indians, A Model of a New York Tenement and Delicious Draft Root Beer.

Once known as the Illinois Asylum for the Incurable Insane.

The world's third-largest scale model of the planets.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

Today this bizarre rooftop phone booth seems like a piece of kitsch but it was once used to spot disastrous storms.

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

While he no longer has an eatery to give him context, this off-brand Paul Bunyan still holds his giant hot dog with pride.

You were once able to challenge a chicken to tic-tac-toe at this park, which is now converted into the Aikman Wildlife Adventure.

The park that the Chicago Stockyards built.

This folk art wall claims to be the world's one and only memorial to the bygone age of hippies.