High Quality Content by WIKIPEDIA articles! Castle Hill refers to either a 165-acre (0.67 km2) drumlin surrounded by sea and salt marsh or to the mansion that sits on the hill. Both are part of the 2,100-acre (8.5 km2) Crane Estate located in Ipswich, Massachusetts. The former summer home of Mr. and Mrs. Richard T. Crane, Jr., the estate includes a historic mansion, 21 outbuildings, and designed landscapes overlooking Ipswich Bay, on the seacoast off Route 1, north of Boston. Its name derives from a promontory in Ipswich, Suffolk, England, whence many early Massachusetts Bay Colony settlers immigrated, and predates the Crane mansion.