The iconic white mansion overlooking Hyannis Harbor, visible to ferry riders traveling to the islands and located next to the Kennedy Compound, has hit the market with a $21.5 million price tag — the highest active listing on Cape Cod .

The 13-bedroom, 12-bath estate on 3 acres includes a main house and a guesthouse at 151 and 155 Irving Ave., with a private beach and landscaping designed by the Olmsted Brothers.

From the water, passersby often mistake the property built in 1914 for the nearby Kennedy Compound , which sits just up the street. Historic photos show the Kennedys sailing in front of the house, and even Jackie Kennedy waterskiing nearby.

“As soon as you turn off Irving Avenue and proceed down the driveway, it’s so stately,” said Paul Grover, the listing agent for the p

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