When I was a kid, the dome jungle gym was the heartbeat of most playgrounds. You always had a slide (that got awfully hot under the sun), swings, a see-saw and the dome jungle gym.
As the old playgrounds are destroyed and replaced with modern, safer ones, the dome jungle gym is disappearing. Too many injuries, I'd guess...
I still see one in West Deane Park, and I snapped this pic of one in New Toronto. One day soon, there will be none left.