Waccabuc is a hamlet and lake in the town of Lewisboro, Westchester County, New York. Lake Waccabuc is known by many outside of the town for its Castle Rock.Waccabuc is considered "New York's Secret Suburb" and is home to a "collection of privacy-loving C.E.O.’s and bright stars in other firmaments," according to an Upstart Business Journal article about the tremendous number of notable residents in a hamlet of just a few hundred people.Before becoming its own hamlet, Waccabuc was originally a vacation retreat established by the Mead family, who are considered one of the First Families of Westchester. The retreat prided itself for having no "tramps, bars, or malaria." A couple of the hamlet's handful of roads, such as "Tarry-a-Bit," are named after the vacation house they originally served. Waccabuc Country Club's main clubhouse sits at the site of one of the original vacation houses.On July 1, 1956, Marilyn Monroe wed Arthur Miller in a Jewish ceremony at a private house in Waccabuc. Their nuptials were celebrated at the home of Miller'sliterary agent, Kay Brown. Some 30 friends and relatives attended the hastily arranged party.The Mead Memorial Chapel and The Homestead are listed on the National Register of Historic Places. The Waccabuc Historic District was listed on July 28, 2015.