Filmdom's best ghost movie
And I would put THE INNOCENTS in second place.
Both films were shot in that end-of-the-world/TwlightZone era of the early-'60s when all you had to do was turn a camera on (I often refer to Opie losing his baseball in the haunted murder mansion on the edge of Mayberry, which is ridiculously creep despite being comedic).
But while THE INNOCENTS is beautifully composed and has some of the most effective deep-focus B&W cinematography in the history of movies, that film always feels like a series of brilliantly-realized macabre vignettes strung together, while THE HAUNTING's narrative holds together better.
In other words, THE INNOCENTS creates its atmosphere visually, optically, to a great degree, while THE HAUNTING creates it atmosphere psychologically (although both films do both, to some degree).
I also find Deborah Kerr to be too shrill for my tastes in THE INNOCENTS and I find it a distraction. Many fans insist that Julie Harris is also terribly shrill in THE HAUNTING, and she is, but that seems like the character being shrill, while Miss Kerr seems like it's the actress being shrill.
Anyway, I place THE OTHERS(2001) with Nicole Kidman and THE UNINVITED (1944) with Ray Milland at third and fourth place for best spook/haunted house films.
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LBJ's mistress on JFK:
https://www.youtube.com/watch?v=WcXeutDmuRA