The U.S. Mint's America the Beautiful quarter program will include 56 issues honoring national parks and sites. Only a very small portion of these coins will be produced with 90% silver in proof form. And they will only be available in these special 90% silver proof sets. The five new 2014 quarters commemorate: Great Smoky Mountains National Park in Tennessee, Shenandoah National Park in Virginia, Arches National Park in Utah, Great Sand Dunes National Park in Colorado and Everglades National Park in Florida. These 90% silver quarters in finest proof quality are by far the scarcest form of these beautiful coins.