The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

The first declared National Monument in the United States.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

This 1,500-acre development hopes to be the Central Park of the South.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

This lovely burial mound is actually a replica that was installed after archeologists excavated the original.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

The small first-floor apartment where the author wrote her Pulitzer Prize-winning book 'Gone with the Wind.'

A hidden oasis just two minutes from downtown Atlanta.

An old bank vault in Atlanta is now the eternal shrine to the King of Rock and Roll.

The largest puppetry museum in the United States houses the world's most complete collection of Jim Henson artifacts.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

The middle finger of modernity.

Europe’s oldest natural human mummy.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

The birthplace of American international flight service has been turned into a celebrity's microbrewery.

Visitors are welcome to enter this lush Key West sanctuary to entertain its plethora of rescued parrots.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

It's a pretty creepy lock-up.

A monument celebrating the idea of reaching inaccessible places.

A rapidly disappearing authentic bit of the old south.