I just got back from a camping trip on top of Mt. Graham, AZ, and it's one of the prettiest locations I've been to. Something about being in an old pine forest is inspiring. I can pinpoint my favorite place on the mountain down to a square meter, too: the top of an abandoned fire watch tower as the sun set over the mountains. That was pretty amazing.
Though as I continue to live in the distinctly un-pretty town that is Tucson, my standards for an amazing location drop lower and lower.
\I head to Germany for a week in August; that'll probably take the cake