President Thomas S. Monson announced that there will be a temple built in Phoenix, Arizona. More information can be found here. You can see a map of completed and dedicated temples around the world here.
If you are interested in knowing more about the purpose of temples, there are a variety of resources available. Click here for some articles and talks about temple worship and the purpose of temples. You can find browse information about temples on our site here, and read some people’s thoughts and feelings (or share your own!) about the temple here. As always, you can also search lds.org on the topic of temples.