Last week 11 Jan 2011 I went on travel to Salt Lake City. The only piece of architecture besides the state house that I briefly saw, would be the Mormon Temple in the center of town. A fellow worker was at the hotel across from the Temple. It is on all the tourists lists but I found out that no one is allowed inside unless you have been converted into a Mormon. Next visit I with I could have taken a small walk around. I did drive by it.
http://www.ldschurchtemples.com/saltlake/
Attached is the image from their website.