I recently acquired (source will not be named) a teacher's edition of National Geographic Picture Atlas of the World. The version I have is an older one, but thankfully I am still running Win98 on this computer. (Give me a break, we're poor.) Good luck finding such a cd-rom new, but I'm thinking ebay might be a good place to start. In the meantime, you can buy a Kids Picture Atlas from the National Geographic website, which might actually be much cooler than the one I have.
Mine shows a world map, and clicking on any country tells you population, topography, weather, and many other facts about that area, as well as photographs of the people and countryside. There are breathtaking landscapes and even examples of music from that area. My kids have spent hours learning about other places and cultures, and this has become a fantastic addition to our regular world studies.