Whats a good classic horror movie?

The Birds, not sure why it freaks me out so much. Flap flap

well, the greatest "The Sixth Sense", one of the best

Exorcismo com certeza um dos mais clssicos. Se no assistiu, assista

I have more than one.They are
Night of the Living Dead 1968
A Nightmare on Elm Street
Invasion of the Body Snatchers

hellraiser and the shining

I've watched a majority of the texas chainsaw movies.

Rosemary's Baby is amazing and haunting

Scream, if that counts as a classic OR a horror, lol

I will always recommend John Carpenter's The Thing as one of the greatest of all times. If you want to see a great creature feature, you will not be disappointed by this timeless one.