The Emerald Necklace consists of a 1,100-acre chain of parks linked by parkways and waterways in Boston and Brookline, Massachusetts. It was designed by landscape architect Frederick Law Olmsted, and gets its name from the way the planned chain appears to hang from the "neck" of the Boston peninsula. In 1989, the Emerald Necklace was designate…The Emerald Necklace consists of a 1,100-acre chain of parks linked by parkways and waterways in Boston and Brookline, Massachusetts. It was designed by landscape architect Frederick Law Olmsted, and gets its name from the way the planned chain appears to hang from the "neck" of the Boston peninsula. In 1989, the Emerald Necklace was designated as a Boston Landmark by the Boston Landmarks Commission.