One of the few remaining relics of the meatpacking hub that made Chicago the "hog butcher to the world."

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

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

This historic hotel invented the chocolate brownie.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

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

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

Marine fossils from the Devonian period are exposed at this park.

You thought Santa Claus didn't exist, but it turns out you were wrong.

The failure of one component toppled this entire bridge during rush hour.

The largest ancient burial mound in Ohio.

A 2,000-year-old Adena burial mound located along a busy street in Columbus, Ohio.

A memorial for an outsider theorist who believed that the planet is actually hollow.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

Where beautiful signs live on forever.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

Victorian-era Egyptomania left its mark on this Nashville landmark.

Two gushing waterfalls of hot spring water within a block of each other.

Yup, that's where the name came from.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

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

A piece of John the Baptist in the American heartland.