When I was young and would visit my grandmother, the park there had some climbing structure made out of steel tubing with a big rope lattice inside. At the time it felt quite massive though trying to guess now it was perhaps 4.5-6m tall at the top. The ropes were pretty dense inside but it was this reverse-hourglass shape so it was pretty easy to go to the edge and not have a bunch of ropes underneath you.

I’m amazed as an adult that that thing was allowed but it was pretty fun at the time and I’d guess not actually that dangerous.