This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The life of one of FDR's possible mistresses is preserved in her palatial Hudson Valley mansion.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

While it now takes more than a dime to open an account this historic Brooklyn bank still displays the opulence of the gilded age in which it was built.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

The smallest island in Manhattan is a manmade landfill dominated by a Buddhist peace arch.

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 a small Puerto Rican island, banks of secret naval bunkers lie abandoned and filled with piles of office equipment.