Hill House Interior

https://en.wikipedia.org/wiki/Ettington_Park_Hotel

From The Wik:


Ettington Park was used for exterior shots of "Hill House" in the 1963 horror film The Haunting.[6] Production designer Elliot Scott was sent around the country to look at a list of country houses, and director Robert Wise personally selected Ettington Park. Some of the cast and crew were housed in Ettington Park during exterior shooting. However, the location did not sit well with Harris and Bloom who upon arriving at the house thought it was "scary looking outside", and Wise had to reassure them. However, the interior sets were constructed and shot at the MGM-British Studios in Borehamwood, Hertfordshire rather than Ettington Hall. When in 2010, Cinema Retro magazine hosted a screening of the film at Ettington Park, actor Richard Johnson stated that he had never actually stepped foot in the hall during filming, and that this was the first occasion he had been inside the premises.[11] Richard C. Keenan describes the house exterior in the film as a "terrifying structure, a perception enhanced with the slight distortion and stark intensity of a wide-angle camera lens and infrared film stock."

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LBJ's mistress on JFK:
https://www.youtube.com/watch?v=WcXeutDmuRA