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

An icon among Florida's pre-Disney tourist attractions.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

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.”

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

A haunted hill that supposedly defied gravity.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

This mysterious artificial cave has long puzzled New Englanders.

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

This decrepit abandoned building is made all the more eerie by its dark history.

In a town that's had a whole lot of giant chairs this one still stands tall, just not the tallest.

This supermarket is suspended 25 feet above an interstate highway.

This ambitious father and son team reigned supreme over the North End, and witches, for many years.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

Narrowest house in Boston.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

Lake Champlain Bridge, the recently demolished and rebuilt bridge where they filmed "What Lies Beneath".

The only surviving fragment of the lost Narragansett Pier Casino.

This miniature feudal castle was built on a whim to honor a US Navy pioneer.