Not sure if you're looking for just quizzes for fun or to specifically improve your geography knowledge. But if you're working on the latter, may I suggest Seterra? I set out last year to learn to label every country on the globe, and the quizzes on there were very helpful toward that goal. I also used it to learn all the flags. It's pretty nifty.

If you're just playing for fun and like the style on Sporcle, feel free to disregard. But in the off chance you're a geography nerd too, you might it.

To be clear, I'm not being paid to support it or anything. I'm just a fan.