I've had this project for a few years, where I bike to parks in my city and micromap them in #OpenStreetMap after. I've updated/added 100+ parks in OSM this way.
Recently I started a "dugnad" in the Norwegian OSM community to close the oldest notes. Last night someone mentioned that we're getting close to 10 000 closed notes in Norway.
Naturally I was unable to go to bed until I reached the threshold.
Funnily enough note #10k closed in Norway was among others in a park!