I remember as a child (that's about 30 years ago...) May bugs used to be very common and were even considered a pest. We used to "play" with them, they were part of our life. A year later they disappeared, and since then I have only seen single specimens of Melolontha melolontha every few years.
Not sure what happened to them, but they are sure impressive. Just imagine the noise they make when you step on one.
That reminds of a rhino beetle I found in my driveway when I was a kid, now that thing was big. It's "horns" (for lack of a better word) were a couple inches long alone.
Have you ever seen a cicada up close? I heard there's supposed to be a bumper crop of them this year in the states.