Did you know Ultra Music Festival is the only one of its kind to take place right smack in the downtown area of a major U.S. city? That's only part of what makes the annual 3-day bash in Miami's Bayfront Park so beautiful, so accessible, and so darn fun. Then there's the lineup: think Skrillex, David Guetta, Armin Van Buuren, Afrojack, Avicii, Carl Cox, and more, spread out over some 7 stages.