Louisville, Kentucky, July 10-12

Equal parts activism, arts, and music, this progressive three-day extravaganza on downtown Louisville's Riverfront draws 65 bands, numerous environmental nonprofits, and 20,000 fans. After-hours river raves take place on the steamboat Belle of Louisville.
Don't Miss The Black Keys, the New Mastersounds, and Appalachian folk rockers the Avett Brothers. Three days, $100;
Intermission Hike underground for hours in the limestone Mammoth Cave National Park (guided tour, $48;
Crash Camp five miles away at American Turners Campgrounds, with alcohol sales and a shuttle ($50 for the weekend;

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