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

Mysterious 500-year-old tapestries depict a unicorn hunt.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

One of only two commuter aerial tramways in the United States.

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

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

One of the oldest continuously-operated gay bars in the United States is allegedly haunted by Truman Capote and Tennessee Williams.

The second oldest continuously operating bar in Louisiana.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

This downtown Dallas art installation is always on the lookout.

The "Seinfeld" diner.

A crumbling hospital from the 1850s on Roosevelt Island.

A terrific purveyor of natural history objects and curios.

This sinkhole was created by a tragic industrial accident and continues to ravage the surrounding landscape.

This legendary "evil" doll has been haunting the citizens of Key West for over 100 years.

19th century tunnels burrowed under Liverpool.

A memorial to the politician who became Great Britain's first fatality to be caused by a locomotive.

The tower was originally used as a chimney for the waste incinerator of St. John's Precinct and Market.

Charles Dickens described the concert room in this amazing Victorian hall as "the most perfect room in the world."

This whimsical public art installation is a unique homage to Liverpool's industrial heritage.

This aging storage facility is the world's largest brick warehouse.

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

The red letters in the literary pavement leading to the library form a mysterious code.