Harry Houdini was an American illusionist and stunt performer, noted for his sensational escape acts. He rests in Machpelah Cemetery, which is a Jewish cemetery, located in Glendale, Queens, New York.
You might find many cemeteries, graveyards and tombs in your location as pokestops, but this one is particularly sinister. Pokemon Go is directing many New York based trainers to go investigate Harry Houdini’s tomb! Just in case you are anyways planning to make a stopover in NY, it would be an added perk to catch some Pokemons while you're there.