A monument celebrating the idea of reaching inaccessible places.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

Here’s how Robert the Doll earned his reputation as the most haunted doll in the world.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world’s largest coastal brick fortresses.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

This was the first homestead registered after President Abraham Lincoln signed the Homestead Act into law.

America's smallest town is run by its single citizen/mayor/librarian/bartender.

Topeka has its own great wall, and it's covered in colorful images from the city's history.

This Wild West attraction is probably more fiction than history, but that doesn't mean it's not awesome.

A museum to a cave explorer whose tragic death was a media sensation, and whose corpse became a tourist attraction.

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

The remains of this visionary community can still be found much as it was a century ago.

This boulder stays on its mountain thanks to a huge chain and on the map due to local legend.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

The world's longest known cave system.

Moonbows over Kentucky.

The first rural cemetery west of the Mississippi is home to the elaborate tombs of St. Louis' local beer barons.