A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

A museum of carnival attractions where you are invited to ride the rides.

Abandoned railway line circling the city of Paris.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

One of the last Jazz Age "Wonder Theaters" in New York City.

Phil Mortillaro uses keys to bring art back to the Village.

Commemorating the spot where the famous scientist fed his pigeons.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

Hear the tales of New York's most notorious criminals.

Unrepaired walls from a 1920 anarchist bomb attack.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

Rummage through this sunken ship, but leave your scuba gear at home.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

The former hotel where Tesla invented the radio.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

An artist's cute bronze subway sculptures belie his violent artistic past.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

Unique antiquarian shop specializing in globes, maps, and prints.