She bought the oceanfront property, known as the Red Gate Farm, in 1979 for about $1 million.
Forty years later, her daughter, Caroline Kennedy, is selling the 340-acre property for a whopping $65 million.
It features an outdoor pool, a tennis court, a boathouse, and a private beach that stretches more than a mile long.
There's even a 'fair tree house' Jackie reportedly built for her grandchildren.
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