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Jamaica Pond is a kettle pond, part of the Emerald Necklace of parks in Boston designed by Frederick Law Olmsted. The pond and park are in the Jamaica Plain neighborhood of Boston, close to the border of Brookline. It is the source of the Muddy River, which drains into the lower Charles River.USGS 2005The pond has an area of about 68 acres (28 ha), and is 53 feet (16 m) deep at its center (MassWildlife map), making it the largest body of fresh water in Boston, and the largest natural freshwater body in the lower Charles River watershed.

Pinebank Mansion was a Queen Anne style house sited on a hill overlooking Jamaica Pond in Boston, Massachusetts. Built in 1868 by John Hubbard Sturgis, it was the only mansion retained by Frederick Law Olmsted in his plans the Emerald Necklace park system. It was the only original structure remaining in the park systemat the time of its demolition in 2007.