It would be awesome to have a giant food fair (or market) where there were booths on a huge world map, with food traditions for an area being represented by vendors in roughly corrisponding places on the map. There are parts of the world which have food traditions that I've never sampled from, and it'd be a fun way to rectify that by wandering around such a fair. Perhaps the UN should arrange this.
I also sometimes wonder how different things would be if Russia had never gained territory in or east of Siberia. Given that Eastern Russia is, by-and-large, not ethnically Russian, perhaps we'd see a number of additional Asian countries, and perhaps China, Korea, and Mongolia would be larger. It seems like it would be very interesting to spend a few years wandering around in central and eastern Russia..