Once the home of legendary style icon Gloria Guinness—one of renowned author Truman Capote's famed "Swans"—this mammoth estate currently holds the record of priciest residential listing in Florida, boasting a nearly $200 million price tag.
Currently being shopped around the globe by reps of Christie's International Real Estate, the 16-acre compound—officially known as "Gemini"—played host to scores of prominent figures back in the day, including the Duke and Duchess of Windsor.
Apart from a jaw-dropping 62,200-square-foot main house, the property features a couple of golfing greens (plus a mini golf course), a sports complex, and a multi-leveled treehouse for kids, on top of a seven-bedroom structure known as the Mango House, two four-bedroom cottages, and a four-apartment manager's building, boasting 33 bedrooms, 34 bath, and 13 half-baths altogether.
Sited on the barrier island of Manalapan in Palm Beach, the mammoth estate—which now belongs to the Ziff publishing family—is flanked by a 1,200-foot stretch of beach edging the Atlantic on top of 1,300 feet along the Intracoastal Waterway.
Notably, the estate showcases a furnished tunnel linking guest quarters to the main house (complete with a fireplace and skylights), on top of botanic garden that's home to around 1,500 species of fauna and flora.

The tunnel linking the guest quarters to the main house is fully furnished and features a fireplace.
Photos and details courtesy of the Wall Street Journal