A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

St. Augustine's record-setting narrow street was designed to protect against pirates.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

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

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

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

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

A self-built castle made by a mysterious man.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

The graffitied ruins stand hidden within the Pennsylvania woods.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Where America's first doomsday cult awaited the end of the world.

A toxic ghost town sitting atop a massive coal fire.

A layered tribute to the work of mosaicist Isaiah Zagar.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

World's first "penitentiary," meant to be humane, drove men insane.

Visit this playground of waterfalls, caves and sinkholes.