This house was the subject of an Edward Hopper painting, which in turn helped inspire the design of the Bates house in Alfred Hitchcock's 'Psycho.'

A replica of a 7th-century church hides in plain sight in the middle of the concrete jungle.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

The real-life site of Ichabod Crane's infamous gourd attack.

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

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

A former connection to City Island, it has been abandoned since the 1930s.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

Hundreds of numbered stakes hidden in the woods mark the graves of the lost souls of a nearby asylum.

The first and only carousel with a lineup entirely of insects.

Hidden inside one of the world's most well-visited zoos is a secret plaque promising eternal life.

Visit the monolithic tomb of America's most famous general.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

A forgotten relic from New York's bygone trolley system hides in plain sight under a bridge.

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

Collect holy water from a Bronx grotto.

Because holiday cheer is at its finest when it includes eerie mannequins, right?