You know, something that made you say out loud, "That's cool".
I haven't been riding long but just a few weeks ago I decided to take this gravel access road and about a mile down the road I saw these things in the air flying around. As I got closer I noticed they were model airplanes, but they were electric and you couldn't hear them. I stopped and started asking questions and one guy let me fly his plane. Pretty cool.
I'm sure there will be plenty more as I continue to explore the world on my bike.