THE HAUNTING and NIGHT OF THE DEMON for sure. I might also add JAMAICA INN. We started to watch it a few weeks ago and we both agreed to watch it later. Too creepy in a slimy sort of way.

I agree with Sfear. The Haunting & The Night Of The Demon.

Also I might add Black Sabbath
The Exorcist
The Kingdom Of The Spiders (I have arachnophobia!)


I'm sure that there are others but I can't think of them right now.

A lot of the scenes from Creepshow like the Crate monster, or the couple he couldn't drown and how their gargling voices echoes through that haze. The SHining blood girls, and when the dude got his face smashed into the curb in American History X.

The Haunting ( best ghost movie ever)
Nosferatu
Night Of The Living Dead
The Uninvited

The Beyond. And not very old but The Strangers, gives me a feeling of helpless isolation which can be scarier than any monster.

The Exorcist
The Grudge
stephen King's IT

HUSH HUSH SWEET CHARLOTTE. 1964

Some really good titles here, especially BLACK SABBATH, NIGHT OF THE DEMON, THE HAUNTING (1963-not the remake::embarrassment::), ONIBABA and especially the original NIGHT OF THE LIVING DEAD-still can give me the heebie jeebies although I've probably seen it 45 times or so.
Some other titles that still creep me out although I've seen them numerous times...
FRIDAY, THE 13th (1980)-Sure it's silly and cheap, but I saw this right before I graduated and it scared the shit out of me, especially when Betsy Palmer is "conversing" with Jason and smiling when she finds Alice's hiding place. When I finally met here at a convention, amazed at how little and sweet she was.
DELIVERANCE (1972)-Many people probably don't consider this a horror film, but I sure do. "That scene" gave me nightmares for years and a perfect example of how vulnerable we can be.
EYES WITHOUT A FACE (1959-may have been mentioned)-Despite the corny musical score (at least on my disc), found this way creepy, especially the audacity of the operation.
CAPE FEAR (1962)-Again, not a horror film per se, but how frightening it would be to be in Gregory Peck's position. Avoid the awful Scorcese remake .
STRAW DOGS (1971)-When I watched the limp THE STRANGERS, I thought a lot of this .