Acqualia today announced the release of World of Where 3.7.3, the application that makes it easy to learn world geography. This update introduces new testing categories like EU Members, WW1 Allies and Former Soviet Republics, in order to teach other general knowledge while teaching countries. It also includes many other small improvements across the entire program. World of Where 3.7.3 is available now for free download. Users can learn whole of Europe without registering, with the purchase of a US$15.95 code.