Munich, Germany
If you can make it to Munich for Oktoberfest you'll find yourself at one of the world's wildest parties. However, even when it isn't Oktoberfest, Munich is still an exciting city rich with art, history, and, of course, beer. For the outdoorsy, there are mountains and glaciers for hiking, biking, and skiing, or stunning lakes to laze at in the summer.
[Photo via @sashared]