Pat O'Hara1947BooksGreat Smoky Mountains National ParkWashingtonGrand Canyon National ParkOlympic National ParkYosemite National ParkOlympicYellowstone National ParkNature's holy realmGrand Teton National ParkMount Rainier National ParkTennessee, Images of WildnessWilderness scenarioWashingtonAuthor data: Open Library