Since its founding on August 25, 1916, the U.S. National Park Service has assembled 419 protected units, of which 62 hold the “national park” designation. To visit all 63 of these treasures one would need to travel to 29 states and two U.

“ Find a national park and come visit!” the annual event’s webpage encourages, pointing to the 433 “parks” across the National Park System, including national battlefields, monuments and seashores – not just places with National Park in their name like Great Smoky Mountains or Yosemite .

Each April, the National Park Service celebrates National Park Week with daily programming and special events. This year, the special week kicks off on April 19, with visitors also receiving free admission to most national parks on that day as well. (National Park Week runs from April 19 to April 27.)