Rosny Cottage was built c1850 and has, over the years, been the residence for farm families and green-keepers for the nearby golf course. The Cottage now houses the Rosny Collection. This collection of realia was formerly housed at Val Hawkes Country Life Museum on the Tasman Peninsula. Council purchased the entire collection in the 1980s. The collection now forms the main part of the display in the cottage which is designed to represent life in the early 20th century.