Of course Oktoberfest makes the list of must-have European adventures. For fans of pretzels, pints, and lederhosen (or dirndls, as the ladies wear), Oktoberfest is a wild, hops-filled party in Munich you must attend. It's set to run from Sept. 22 through to Oct. 7 this year, so mark your calendars and prepare for a weekend festivities (and, obviously, a whole lot of beer).