I have 1.5 million miles and no idea where to go

This may be a first for Reddit. I have accumulated over 1.5 million miles over the past two years from work travel and since I actually enjoy my job and the cities I travel to, I am not burnt out on flying or traveling. I am looking to take a vacation and know that my miles will be wasted if I don't use them. I live in the US and have a solid 4 weeks available to travel. <br><br>I know I will never have this many miles again and need to use them on the most awesome trip possible. I'd love to hear your dream vacation ideas. What should I do?!