Yellowstone, the Grand Canyon, Shenandoah, and Badlands are among America's irreplaceable public lands. They’re awe-inspiring places that families treasure and countless species depend on. But our cherished outdoor spaces are facing more threats than ever—from cuts to the National Park Service to policies that could increase pollution of their air and water or threaten their protected status. This #NationalParksWeek, we’re reminded: The places we love are worth protecting.