Probably the most fun place to go, even as an adult. Michigan is a legal state for recreational weed now and there's always a shit ton of people smoking there nowadays. Aside from that, there's all sorts of medieval style booze to try. Perfect place to get crossfaded and just have a good time. Get a turkey leg for when the munchies eventually hit, they are massive and delicious. There's tons of fun little activities that are infinitely more fun when faded.
Me and my friend went to the Michigan Renaissance Festival and got crossfaded and then proceeded to rock climb, eat turkey legs, and hit on medieval bitches.