I love the way geologists can map present-day political boundaries onto maps of ancient landforms. Here's a map of Western Pangaea during the Permian era showing primarily North America but the corners are: Belorus, Cameroon, Guatemala and Alaska. Would there be interest in a simple game based on a map like this? Has it been tried before? (It seems everything has been at least once!)
If there's enough interest I'll add this to my list of maps to work on after the two I currently have in the Workshop are done.