There is only one playground I remember which didn't bore me like after half an hour (unfortunately it got dismantled some years ago and doesn't exist anymore)

There is only one playground I remember which didn't bore me like after half an hour (unfortunately it got dismantled some years ago and doesn't exist anymore) and had the heights, challenges, speeds (steep long slides) exciting for a 6-10 year old version of mine. But most of the times me and my buddies just climbed, jumped and fell from 'ordinary' structures around our city. We specifically looked out for like interesting bridges, little monuments, fire escapes, rooftops to climb up to etc. Strained ankles, wrists, broken toes, bleeding/scratched up elbows, knees, hands, noses, mild concussions, things you would expect from skating and such. No broken arms or legs, though. Tbh the most terrifying, horrible things happened in day to day ordinary traffic. I remember vividly from the aforementioned playground, once, one small boy (4-5 years old) playfully but erratically running away from the perimeters out on to a bike lane and getting smashed by a race cyclist (probably riding 20-30mph) before my very eyes. There was screaming (of shocked parents), loud yelling from the cyclist himself and an unconscious child lying there still. Also second hand stories of trucks hitting cyclists, buses hitting schoolchildren ... the worst things I've heard of from falling, tripping, slipping were broken limbs with the following plaster castings displayed as a badge of honor. So, the most dangerous things for children out there are adults (with overpowered machines).