Held on a dairy farm in Bethel, NY, 1969's Woodstock Festival was called An Aquarian Exposition. The three-day event featured 32 acts including Grateful Dead, Canned Heat, The Who, Jimi Hendrix, and Janis Joplin. Although organizers planned for around 50,000 people, around 200,000 tickets were sold, and when over 500,000 people showed up, they were forced to remove the fence and turn it into a free concert.
As the most famous festival of all time, it's left a legacy that captures the free-love spirit of the decade. A 1970 documentary called Woodstock captured the epic concert weekend, and revival festivals took place in '79, '89, '94, '99, and 2009. That same year, 40 years after the original festival, Ang Lee's Taking Woodstock brought a comic spin to the event.