Cygnus is the swan, and it is a pretty good sized constellation, and you can sort of see the shape of the swan, unlike other objects. The asterism of the Northern Cross is also here, and in case you were wondering, it's a lot larger than the Southern Cross (which you can't see from Iowa), but it is made up a slightly fainter stars.
The star Albireo is really nifty - it is actually two stars, but you can only see one star there with your eyes. If you were to look at Albireo with a telescope, you'd see one blue star and one yellow star - and these colors would be very obvious.
This constellation is located high overhead during the late summer, early autumn months.