The Hill Airforce Base Aerospace museum is a really cool place to go to. THe price of admission is free. They do ask for monetary donations and they do have a gift shop inside. Tours are also available. There are exhibits inside and outside of the museum. At the time of this writing I can tell you there are many new plans added. They just Added a B1 Bomber, F15 Eagle, a F4 Phanthom and and F-18 Hornet. These are some of todays modern aircraft.
Inside the museum they have an SR-71 black bird which is a spy plane. They have many exhibits and there are just too many to name off here. Its definitley worht your time to go in and check out the history of the base and the Air Foce in General.