There is a state park here in AL that has an old school metal playground. The massively tall skinny slide with low sides, the spinner without guards, the tall swings where you can get past vertical on the up and down swing, the old school teeter totters which move fast enough to lift you off the seat and chip your teeth...
I'm amazed it's still there. A few years ago we went to this park, not knowing the playground was there, to camp for the weekend. While my wife and I wandered around amazed some lawyer hadn't ruined the place yet, my (at the time) 4, 4 and 6 year old kids had the best time they've ever had. Those old rides might have been dangerous, but I'd forgotten how much better they were than the stuff we fill playgrounds with now.