Forty-four years ago, a farm in upstate New York was transformed into the backdrop of one of the most significant concerts in rock history. The inaugural Woodstock Music and Art Fair laid the foundation for countless mega-raves and urban bashes to come, from the Electric Daisy Carnival to Governors Ball to this weekend's Bonnaroo Music and Arts Festival.
A few festival necessities have remained the same since that rainy August weekend in 1969 – food, water and shelter, namely – while others have changed dramatically over the intervening half-century (do you have your automatically adjusting headlamp yet?). Which leads us to 'Roostock.
The rules are simple. First, take a close look at each photograph. Next, digest our whimsical captioning. Then, decide if the picture was captured at Woodstock or one of the past 11 Bonnaroos. Once you've made up your mind, click to reveal the answer.
Photo research by Griffin Lotz, RollingStone.com assistant photo editor. Photo credits (from top to bottom): Ralph Ackerman/Getty Images; C. Taylor Crothers/FilmMagic; Ralph Ackerman/Getty Images; Katie Stratton/Getty Images; Michael Loccisano/FilmMagic; Ralph Ackerman/Getty Images; Jason Merritt/FilmMagic; Michael Loccisano/FilmMagic; Michael Ochs Archives/Getty Images; Ralph Ackerman/Getty Images
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This article originally appeared on Rolling Stone: Woodstock or Bonnaroo: Where Are These Photos From?