The oldest farmer's market in America is so ancient it was approved by the King of England.

These disused steel furnaces are now haunting ruins that may one day be a national park.

Once America's longest-manned military fort, now an abandoned hulk.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

The language and heritage of a nearly forgotten culture can still be explored in this Southern enclave.

These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

Lovingly nick-named the "Brick Dick" this municipal tower was winner of the World's Most Phallic Building Contest.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

A former seaside jewel built for the everyman is now simply a neglected art deco fortress.

This mountaintop beacon is only lit three times a year but shines like some kind of all-seeing eye.

This New York holdover was built to provide housing for shopgirls and still does not allow men above the lobby.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

On this Puerto Rican island, many abandoned naval ammunition bunkers sit open while a few have been padlocked by locals as personal storage.

Once the most flame resistant building in the country, the South Carolina Historical Society building was almost burnt down in a fire.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

Forgotten and then destroyed by fire, this was once one of the largest saltwater swimming pools in the world.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

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

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

The Flatiron Building's storied West Coast cousin is a lot more into religion.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.