As someone who has enjoyed playing GeoGuessr-like games in the past, I find it a bit fun to enter/guess a completely random username and see what edits it has made. Interestingly, quite a few of them are concentrated in the Germany/Switzerland/Austria region (the US is popular too)

Edit: I had no idea that https://www.openstreetmap.org/history shows a list of the most recent changes in a sidebar, and there seems to be a similar trend too in terms of where OpenStreetMap is edited most often.