Castle Hill refers to either a drumlin surrounded by sea and salt marsh or to the mansion that sits on the hill. Both are part of the Crane Estate located on Argilla Road 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.