US National Parks Map - The World includes this great country too! I'm proud to say that my parents took us to so many of the National Parks when we were kids and I've added to the list as a grown up. Still more to see!
Would be a great road trip! Drive from the Alberta, Canada / Montana border to the Arizona / Mexico border with plenty of amazing stops along the way, like Yellowstone National Party, the Rocky Mountains, and the Grand Canyon.