I love geography

Google Earth is the most user-friendly and well-known application of GIS: Geographic Information Systems. Unlike most GIS applications, Google Earth has one program-set layer of standard information - the imagery - and then a load of optional layers showing things like roads, Wikipedia article links, international borders, cities and so on. Anyway, I am a big fan of the near-continual upgrading of the imagery (and no, it isn't live!). Recently Switzerland had a nice update with great resolution on both the images and the elevation model:





Denmark was also updated, but to be honest isn't quite as impressive. Can't think why.