Where should I go on my honeymoon?

I will be leaving on Sept. 14 or 15 from Louisville, KY. I want to take a two week, international vacation for less than $5,000 including air, accommodations and most of the rest. I don't want to go to the Caribbean or Mexico--spending 2 weeks on the beach sounds far too boring. Western Europe is out as well, I've traveled most of Western Europe before and my fiance wants to go somewhere that is new to both of us. I want adventure travel, not deluxe travel. Anything is an option--Peru, Thailand, Morocco, Croatia, etc. Where should I go? Any links to particular trip options or vacation packages will be greatly appreciated.