Geography Resource

We just began our US tour with the Trail Guide to US Geography book. For someone who enjoys having all information presented in a nice, tidy package, I've been a bit surprised that this book requires <<gulp>> research! And of course, with 2200+ books in my personal library, not ONE book with state maps in it. Grrrr. So I resorted to using the internet to help son find the location of state rivers. I found this neat site, which has endless amounts of info, but also cool state topographical maps. Check it out!