The United States modern commemorative gold coins are a series of coins issued to honor significant events, individuals, or themes in American history and culture. The 2014 twenty-dollar gold coin features designs celebrating the history of the National Parks. These coins are typically made of 91.67% gold (22K) and are sought after by collectors due to their limited mintage and artistic designs. Their value is determined by both their numismatic significance and the current market price of gold.