This is a set of 20 silver 25c ATB National Park coins:
2010 - 5 coins : Grand Canyon, Hot Springs, Mount Hood, Yellowstone, Yosemite
2011 - 5 coins : Chickasaw, Gettysburg, Glacier, Olympic, Vicksburg
2012 - 5 coins : Acadia, Chaco, Denali, El Yunque,  Volcanoes
2013 - 5 coins : Great Basin, White Mountain, Peace Memorial, Fort McHenry, Mount Rushmore 
   They are all grade by NGC PF 70 Ultra Cameo