Definitely Sedona, and Grand Canyon. Plus there are a few airplane graveyards in Arizona... Goodyear, Marana, Pinal, Tucson International, Davis Monthan (can't land there but you can fly over parts of it going into Tucson, and there is a museum between KTUS and KDMA where you can get a tour of the boneyard. It is the third largest aviation museum in the US)