A World Almanac that anyone can contribute to and edit, in the same way as Wikipedia.
This will include records, weather records like record high or low temperatures from each of the world's places. Records like Zzyzx Road in southeastern California and historical records will also show up. Even world-records especially from The Guinness Book of World Records and the largest metro-cities including Nile, the world's longest river to be posted also on Wikinac. This Wiki will probably be launched in no time.