Is there a website that monitors months/time periods/destinations for when you can use your miles? In other words, if I wanted to go to Amsterdam in December, is there a website that I can check if there's anything available, besides going to AA.com and checking different dates/destinations?

Or, I'm really up for going anywhere, is there a site that lists destinations and when you can use your miles to go there? ie. I'll go anywhere in December in Europe or Asia, anyway I can check options without typing in every country that exists?