The 2010-2015 Nation Park Quarters Set includes 30 uncirculated 25 cent coins from the America the Beautiful series. Each coin is composed of copper-nickel and was struck as a business strike in Philadelphia and Denver. These coins are ungraded and uncertified, showcasing the beauty and diversity of the United States national parks. This set is a valuable addition to any coin collection, representing the rich history and natural beauty of the American landscape.