A century ago, Glacier National Park was home to some 150 ice sheets and today, perhaps 25 survive. In 30 years, there may be none.
Did you know there's an underwater national park, Biscayne national park, home to the third largest coral reef? See more of Fernando Samalot's work here.
Despite two summers of record attendance at Yellowstone, only 1 in 5 visitors of national parks are minorities.