#5: Night of the Living Dead (1968): No excuse on this one. AMC will be playing it all night starting at 6pm eastern time. This is George A. Romero at his best, which is showing us that he is the zombie master.
#4- Nosferatu (1922): There's nothing more terrifying than a silent horror film. This is one of the earliest vampire films that showcases visuals and music to scare audiences. If you can't find F.W. Murnau's version try Werner Herzog's. Herzog's version is not a silent film, but I prefer Murnau's silent version.
#3-The Shining (1980): This is one everyone should see. Jack Nicholson gives an amazing performance and he will scare the crap out of you. Not to mention the little kid that rides his bike around the hotel and sees bodies decapitated with blood everywhere. The film starts out slow, but it builds up to a climatic ending. Some iconic quotes came from this movie such as "Here's Johnny!"
#2-The Birds (1963): I've yet to see this one on any of the "best of horror" lists or sites. Hitchcock is horror. He can take a simple creature, like bird, and turn it into our worst fears. What if the everyday creatures we ignore eventually take over the world?
#1- Psycho (1960)- As I've said before, no one can remake a Hitchcock film even if they tried. Don't watch the Gus Van Sant version because it does not even come close to the black and white imagery and the infamous "shower scene." Psycho set the direction for many famous slasher films of today and also psychological horror films.