Secretary of the Interior Ken Salazar has announced that National Park Service officials will waive admission fees on 17 selected dates throughout 2011 to encourage all Americans to visit a national park this year. With 394 national parks throughout the country, most Americans live within a few hours of a park, making them places for easy and affordable vacations any time of the year. Many national park concessions also will offer discounts on fee-free days, saving visitors money on food, lodging, tours and souvenirs. For more information, visit the National Park Service website.