The highway's southernmost spot is a beloved local attraction.

"We Seceded Where Others Failed."

The famous boat that once ferried Bogart and Hepburn still floats in Key Largo after being abandoned for years.

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

This New York florist also sells traditional tofu pudding.

A rehabilitation center for some of South America's most unique and endangered animals.

A little known Colombian theme park of giant curiosities.

This tiny shop has been serving traditional tamales for more than 200 years.

This picturesque mansion has gone from opulent ruin to nature museum.

This spooky road cut through a mound of ancient coral might be haunted by a witch.

A fiery crater has been burning in the Karakum Desert since 1971.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

This humble historic facade hides a history of boozing and the gentlemanly sport of rat-fighting.

The best place in New York to pick up the controversial, notoriously foul-smelling Asian "king of fruits."

Built just after the American Revolution, the oldest row house in New York City still stands in Chinatown.

A hands-on traveling collection of the innovative devices of yesteryear.

This abandoned subway station can still be seen on regular commuter trips.

Down a stairway in the East Village, you could once read a plaque describing an alternate history of a fictional version of Manhattan.

This former crime corner has been turned into an eclectic community center.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.

Underneath the bustling city streets, a hydroponic farm grows unique herbs in an urban oasis.