UK, 1979

A topless woman is feeling the music as Led Zeppelin performed at the Knebworth Festival.

Photo: Evening Standard/Getty Images

New York, 1969

A man is captured taking a nap between two cars during the Woodstock Music and Arts Fair festival.

Photo: Bill Eppridge/Getty Images

LEFT: A couple is captured enjoying their day in their small tent at the Isle of Wight Festival in 1969.
RIGHT: A woman is standing nude in the large crowd that gathered for a Hyde Park concert in 1970.

Photos: Getty Images

A large crowd is having fun at a lake in the middle of the woods in 1970.

Photo: Getty Images

Vermont, 1970

A hippy mother is inviting her son in the water during the Alternative Media Conference held at the Goddard College.

Photo: Robert Altman/Getty Images

UK, 1972

Dozens of hippies gathered at Stonehenge to celebrate the summer solstice.

Photo: Roger Hutchings/Getty Images

LEFT: A couple is posing during the Woodstock Music and Arts Fair in 1969.

RIGHT: A group of friends is having fun in a pile of foam at the Isle of Wight Festival.

Photos: Getty Images