While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

This park is home to a massive bird sanctuary. And maybe buried treasure!

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

It's a pretty creepy lock-up.

Opened in 1976, this monster-sized version of the fast-food franchise is sometimes called the Epic McD.

An eclectic treasure trove of maritime marvels.

Georgia's first brewery is also one of its oldest surviving buildings.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

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

The longest navigable underground river in the United States is home to countless blind and albino animals.

This memorial to the Mercury Seven astronaut stands at the site of his former elementary school.

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

The only freestanding table rock formation east of the Mississippi.

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

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

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

Less a museum than a bizarre fantasy world created by artists and engineers.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

Part of a worldwide art project, this mysterious semicircle of concrete shapes holds the pieces of a larger story.

This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

Home to a collection of artifacts and specimens from one of the world's preeminent geologists

Symbolic attempt to overcome the issues of life.

The fourth-oldest baseball stadium in the United States is in a league of its own.