7. Roskilde Festival

The Buzz -- Located a half-hour's drive from Copenhagen, this four-day music festival is staged in an open field and is known for its deafening volume. The variety of performers each year (nearly 200 of them) is stunning. The lineup has included diverse acts such as Arctic Monkeys, Beck, Franz Ferdinand, Nine Inch Nails, Sigur Ros, Lil Wayne, Lily Allen, Ben Folds, Kanye West, Happy Mondays, Rufus Wainwright, Deus, Coldplay, the Boo Radleys, Yellowish, Yeah Yeah Yeahs, Anoushka Shankar, Tool, Nick Cave, Floetry, and Matisyahu. Tickets include admission, camping, luggage storage, and events and activities. The eight-day ticket includes four days of "warm-up" festivities!