Discovering the surroundings

Ruben says: I'm especially interested in Nat. Parks and Nat. Monuments - they are just the best! I've an 'America the Beautiful' pass, which allows me (and the whole car I'm in) to visit each Park without fees. So if somebody is interested, just write it in here. I'd prefer White Sands, Petriefied Forest or Badlands. But I'm open for everything (how about Alaska? ;-))-