(AP) John Williamson, a pioneer of the 1960s sexual revolution as co-founder of Topanga Canyon’s Sandstone Retreat, where nudity and free love once took place with abandon, has died. He was 80.

Williamson died of cancer March 24 at a hospital in in Reno, Nev., according to his wife, Barbara Williamson. The pair had lived on a Northern Nevada ranch for the past 18 years, taking in abandoned lions, tigers, cougars and other big cats.

They were a young newlywed couple in 1968 when they bought a cluster of rundown buildings on 15 acres overlooking the Pacific Ocean and turned it into the Sandstone Foundation for Community Systems Research.

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