This passport book is a guide to the national treasures in America. Using special interpretive stamps and park cancellations, the passport book is filled out as you travel from park to park. The book divides the country into 9 geographic travel regions for easy reference. It contains maps, park information, and a listing of all national parks for each region. The passport has places for you to collect the series of stamps which are issued each year, and where you can cancel your book when you visit a national park. Whenever you visit a national park, be sure to get your passport canceled with the ink markings that record the name of the park and the date of your visit. They are free of charge. Interpretive stamps are sold as a set of ten each year and sold at most national parks.
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