Last week we visited an interactive Classic Traveller map. This week let's go closer to home. National Geographic has put up an amazing site where you can zoom in to a desired area on the Earth's surface and BOOM - print a PDF of a detailed topographical map. They did this to aid outdoor photographers and other adventurous sorts, but it seems to me the perfect tool for running an RPG in a modern setting. It will certainly get use in phase two of my Top Secret game I'm running soon. Check it out - if you love maps you'll get lost for hours.