Forest walks, books, coding games or simulations, playing games like Creeper World 3 or Parkitect or Geographic Adventures, those are more common things I guess
* https://colonist.io (Settlers of Catan)
* https://really.boring.website (Scattergories)
* https://geoguessr.com (it is what it sounds like)
* https://skribbl.io (Pictionary)
* https://thewikigame.com (wikipedia racing game)
EDIT: oh I see:
> The game, at its most basic, presents players with a Challenge: that is a Start Article and Goal Article that must be connected via clicking article links, during a given Round.
> Different game modes require players to connect articles the fastest, with the fewest clicks, or other combinations and variations.
I don't care that much about getting better, though of course it happens naturally with time. I just like being in the ocean and how it forces me to be present. It never fails to bring me a sense of peace while I'm out there, and I feel great after a session.
The downside is that the places I'd be happy living in are now greatly reduced.
[0] https://codegolf.stackexchange.com/
[1] https://github.com/Etheryte/right-click-opens-link-in-a-back...
If you have a course nearby, it's a really accessible sport because all you need is a couple of plastic discs. It's a great way to get outside and walk a couple of miles. Plus it has a lot of nerdy elements (disc flight numbers, release angles, form, plastic types, etc.). And for me, it's fun whether I'm playing by myself, with friends, or with my kids.