What are the most beautiful places in Washington State?

I am looking for a wonderfully beautiful, secluded out of the way place to have my wedding. It will be a very small gathering ( 5 people) and we would prefer a place that is out in nature, publicly accesable, and beautiful. The fewer tourist that we run into the better. Neither of us are big hikers, so a place that is easy to get to woudl be best, but a little hiking is okay. Waterfalls, forests, and wonderful views will be top of our list. Let me know if you have suggestions.