<Li> Jill St. John </Li> <P> Robin's Nest is the fictional beach front estate on the island of Oahu, Hawaii, which serves as the residence of the main characters . In the series, it is owned by renowned novelist Robin Masters, who employs Jonathan Higgins as the estate's caretaker and Thomas Magnum as its security expert . Higgins resides in the estate's main house while Magnum occupies the guest house . </P> <P> In reality located in Waimānalo, the 3 - acre (1.2 ha) beach front property is located on the east shore of Oahu at 41 - 505 Kalanianaole Highway (Route 72) near Waimanalo Beach (21 ° 19 ′ 30" N 157 ° 40 ′ 48" W ﻿ / ﻿ 21.32500 ° N 157.68000 ° W ﻿ / 21.32500; - 157.68000). Called "Pahonu" ("turtle enclosure" in Hawaiian), it is also known locally as "The Anderson Estate". The property was used for hundreds of years for raising green sea turtles for the Hawaiian royal family and includes a 500 by 50 foot stone wall that surrounds the former turtle raising pond . Since 1978, it has been on the National Register of Historic Places listings in Hawaii . Developed as a residential estate in the early 1930s, the estate comprises an 11,000 - square - foot (1,000 m) main house, a boathouse (which in the series appears as the guest house that Magnum occupies), a gatehouse, a private tennis court, a beach front and the registered tidal pool . </P> <P> Originally owned by Cox Communications heiress Barbara Cox Anthony, it was placed on the market with Sotheby's International Realty for $15.750 M in January 2014, it was sold for $8.7 M in March 2015 to Seth Madorsky, a Chicago lawyer with close ties to then - President Barack Obama, and later transferred to an LLC registered in Colorado . </P>

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