https://d.lib.ncsu.edu/collections/catalog/buch0036#?c=&m=&s=&cv=&xywh=-748%2C-146%2C5402%2C2906
This is the pool at the Biltmore Estates in Asheville, NC. It looks a lot like the pool Q posted.
https://commons.m.wikimedia.org/wiki/File:Indoor_Pool,Biltmore_House,_Biltmore_Estate,_Asheville,_NC(46727962521).jpg
I had to go back and check, you are correct, it's the same pool.