As the nation prepares for another birthday, consider a trip to one of these national parks to celebrate.

From ranger-led programs to hikes to campfire programs, there's plenty to do in America's best natural lands.  And there's even more to do just outside the park gates, like festivals, fireworks, parades and classic car shows. Take a look at six must-visit national parks to inspire your true red, white and blue over the Independence Day holiday.