High Watch, formerly named as Holiday House and also referred to as the Harkness House by locals, is an 11,000 square feet (1,000 m2) home, sitting on 5 acres (2.0 ha) in Watch Hill, a US historic district in Westerly, Rhode Island. It is a Colonial-style mansion situated in a seafront estate, including a private beach, and is the most expensive private home in Rhode Island, valued at $17.75 million in 2013.