One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

Snack on a partially gestated duck egg.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

Elevated freight railway turned wildly successful urban park.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

This mysterious marker puzzles pedestrians and infuriates geographers.

Historical figures from New York City's Catholic community reside in Midtown.

The flagship building of an early national restaurant chain is a superb example of terra cotta art.

The famed amusement district marks the beginning of summer with a wild procession of nautical creatures.

Recovered suit of a cannibalistic West African gang.

A uniquely lettered street sign marks the corner where the iconic word game was invented.

The oldest colonial fortress in the Americas was once the home and later prison of Christopher Columbus.

Built in 1512, the oldest cathedral in the Americas.

Renowned restaurant tucked in a cave once occupied by buccaneers.

In the back of a nondescript sports bar is a museum-worthy mural by legendary cartoonists.

A controversial magical figure is hidden within a diorama of the city.

The Vatican of the movie industry turned into an actual church.

A young woman's senseless murder led to the controversial psychological theory of the "bystander effect."

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

The first piece of public art dedicated to LGBT rights.

The mysterious image is believed to show Edward Hyde, 3rd Earl of Clarendon, in a beautiful blue dress.

A mysterious statue of a leather jacket-clad rebel leans coolly on an odd yellow clock.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.