Sometimes you're in the mood for total relaxation on vacation, but sometimes you want to go a little wild (one word: Ibiza). With the pending doom of summer's end, it's time to put on (or take off) our Saturday's best and head to the world's best party destinations. Nightlife isn't all spring breakers and college co-eds; nary a keg or piñata in sight, these spectacular, world-class destinations put a glamorous and hedonistic spin on letting loose and experiencing party culture at its peak. See even more of them at Jetsetter.com. Text and captions courtesy of Jetsetter.com.