Tomorrow, July 24th, the Red Butte Gardens in Salt Lake City are offering FREE admission from 9:00am to 5:00pm! If you have been wanting to take your family to these gardens without spending a fortune, this would be the perfect time to do it.
Keep in mind, free days like this are generally busier days. You will want to plan on arriving right when they open at 9:00am if you want to beat the crowds.
(Thanks One Cheap Chick)