In rural Iowa, an imported 19th-century windmill overlooks an unlikely enclave of Danish culture.

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

This shrine commemorates the site of the first known Catholic mass in the United States.

Built around 1723, this is the oldest surviving home in the U.S.'s oldest colonial city.

One of the oldest, tallest, and most haunted lighthouses in America.

Around 50 million gallons of water flow from this spring every day.

A museum and gift shop in a small Illinois town commemorates the work of E.C. Segar and the local figures on whom he based his characters.

The hometown of Popeye's creator is littered with a growing collection of granite cartoon characters.

This curious headstone is labeled simply as "The Queen."

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

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

The only mill in the state that features a covered bridge.

This grassy field marks the site of a surprising religious conflict.

Romance fans worldwide make the pilgrimage to this group of historic covered bridges in rural Iowa.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

One of the oldest and tallest lighthouses still in service on Lake Michigan.

This was once the largest four-sided clock in the world (yes, even bigger than Big Ben).

Statue dedicated to the star of an old television show.

A place to eat for on-the-run agents and espionage enthusiasts.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

Salina's eye-catching giant mural depicting children at play is painted atop a century-old mill elevator.

A natural formation that resembles a camel resting in the New Mexico desert.

The 7,000-year-old calcium carbonate formation creates a magnificent natural bridge.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.