The interior was actually a film studio in England.
Stephen King got the idea for the movie when he stayed at the Stanley Hotel
in Estes Park, CO. The made for t.v. version of The Shining was actually filmed at the Stanley.
More info then you wanted, right? I'm the Cliff Clavin of The Shining trivia! ;-)
Mr. Stanley built the hotel and used to transport guests there in his "Stanley Steamer" automobiles, which worked in the cold much better than contemporary gasoline or electric cars.
SD