The Nimbin Aquarius Festival was a counter-cultural arts and music festival organised by the Australian Union of Students. It was the fourth in a biannual series of festivals, first organised by the National Union of Australian University Students (NUAUS). The First Australian Universities Arts Festival was held in Sydney in 1967, and the Second Australian Universities Arts Festival was held in Melbourne in 1969. The third added "Aquarius" to its name and was held in Canberra in 1971. The fourth and last was held in Nimbin, New South Wales in 1973.