Display your quarter collection in this educational Collector Map. Openings for all 56 National Park Quarters. Big 13" x 16.5" Acid Free Archival Safe Board construction is inert and safe for your coins. The National Park Quarters Coin Act of 2008 - Requires quarters, beginning in 2010, to have designs on the reverse depecting one national site in each state, the District of Columbia and territory of the United States. 56 Different designs will complete the program from 2010 through 2021.