For a couple weeks each summer the fireflies come out in all their glory, and we've been fortunate enough to get quite a show. To give you a hint of how beautiful it is here is a pretty good video of the fireflies out and about.
The last three nights Craig and I have gone out to watch the fireflies and we are loving it! We just got back from walking back in the woods a little ways and we were surrounded by fireflies. It was magical.
We've been reading up on the fireflies and have learned that they are disappearing (most likely due to urbanization, pesticides and light pollution) so you better get out and enjoy the fireflies while you still can. If there aren't any in your area you can come out and visit!