It's one of the most famous hotels in New York, but these walls have seen their fair share of horror over the years. Take the murder of Nancy Spungen, allegedly killed by Sid Vicious of the Sex Pistols. And then there’s Mary, a grieving ghost who survived the Titanic while her husband perished, and can be seen staring forlornly into mirrors throughout the hotel. You don’t see that on TripAdvisor.