Robin Williams once owned a nearly 20,000-square-foot mountain mansion surrounded by 640 acres of vineyards, olive trees, trails and luxury amenities. He listed the secluded Napa Valley property for $35 million in 2012. Four years later, it sold for $18.1 million in cash.

Robin Williams’ Villa Sorriso was far more than a celebrity home. Set across about 640 acres in California’s Mayacamas Mountains, the secluded Napa Valley retreat combined…

Robin Williams once owned a nearly 20,000-square-foot mountain mansion surrounded by 640 acres of vineyards, olive trees, trails and luxury amenities. He listed the secluded Napa…