In the end, Queen Elizabeth died at Balmoral Castle but this was appropriate. Nestled deep in the Scottish Highlands, it was one of her favorite residences and she spent her summers there. Buckingham Palace was the official main residence of the Royal Family but she never loved it there.
Balmoral offered privacy that the other estates didn’t have. Furthermore, she pursued her favorite outdoor activities including horse riding and shooting. Meanwhile, Prince Philip proposed to her there and the couple spent their honeymoon in Scotland (via People).