A luxuriant botanical garden below sea level.

A 200-year-old building in the French Quarter that was to be Napoleon's home in the New World.

A haunted hill that supposedly defied gravity.

More than five miles of underground passageways.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

New Orleans' famous cemetery, located on the site of a former race track.

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

Arrr! The most authentic collection of pirate artifacts in the world... matey.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

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

This home is decked out like a psychedelic explosion of colors and bowling balls.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

The largest cemetery in the American Southeast is a hidden gem near the heart of Atlanta.

Historic funicular railway, believed to be the shortest railroad in the world.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

This quirky curiosity shop takes its cues from the world's bazaars.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

This grand gothic brewery has been pumping out suds for over a hundred years.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

An enormous park-like oasis, full of famous Chicagoans’ graves.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

The trials and tribulations of marking Poe’s grave.