Are there any worldbuilding exercises out there that don't centre on the creation of fantasy fiction?

I'm a worldbuilding hobbyist. I don't write and I'm not particularly interested in fantasy, but I'm extremely passionate about worldbuilding. I've played alot of games like micro nations, alterna history etc. and I've tried my hand at model building and others, but I still yearn for more. <br><br>I'm extremely interested in the idea of worldbuilding, but I'm not super excited about fantasy. I'd like to find some more grounded worldbuilding exercises or hobbies that still scratch my worldbuilding itch.