We've gotten so used to using Google Maps, that perhaps we've forgotten that there are many other sources of maps on the intertubes. The New York Public Library has a webpage devoted to its Lionel Pincus and Princess Firyal Map Division, which contains the world's largest public map collection with over 400,000 maps. Their website has a long list of links to a wide range of maps, from antique to digital, dating back to the 17th century. They also have a cool introductory video about their collection called Mapping the World.