The 2011 ATB (America the Beautiful) quarters were issued as part of a series celebrating national sites and parks across the United States. The Denver mint produced a specific 25-cent roll featuring these quarters. Each coin in the roll represents one of the five sites honored in the 2011 release, including locations such as Gettysburg National Military Park and Glacier National Park. These collectible coins are sought after by numismatists for their unique designs and representation of America's natural and historical treasures.