They look to Missouri for the New Jerusalem. Joseph Smith received revelation in July of 1831 that the New Jerusalem and a temple would be built in Independence, Missouri and that the gathering of Israel would begin (Doctrine and Covenants 57:1-3).
Have you ever read an Ensign magazine? They go on for pages and pages and pages about Joseph Smith, there’s usually an article about Brigham Young. God gets his first mention on page 83 in a new church ad.