of plantings befitting Wynne's vision of an English park. Wynstay has aesthetic significance as its character, planning, and the quality of the architecture and landscaping unashamedly and deliberately seeks to establish the qualities of affluence and opulence; a private "retreat". The architectural styles, use of materials and the functionality of the buildings, along with the rich plant collection from trees, to shrubs, perennials, climbers and bulb layers successfully create an idealised, romantic and sometimes fanciful recreation of an English rural estate. Wynstay has historic significance to the locality as one of the early European hill station properties on Mount Wilson and is rare as a relatively intact, large original hill station remaining in the same original family's ownership. Of particular importance is the presence of the first Gothic style cottage built by Richard Wynne, the larger Victorian cottage Yarrawa / Old Wynstay, and the 1923 sandstone house that demonstrate progressive development of the site by the Wynne family from the late 19th to the early 20th century. The garden elements such as the stone and wrought iron gates, crenellated rubble dry stone walling and stables, Turkish Bath House and collection of specimen trees, avenues, dell and sunken garden demonstrate extraordinary richness rare in gardens of this period. Wynstay has historic significance due to its association and establishment by Richard Wynne, a prosperous merchant who became a prominent citizen of Victorian Sydney, whose descendants continue ownership of the property. Wynstay Estate was listed on the New South Wales State Heritage Register on 12 April 2002 having satisfied the following criteria. The place is important in demonstrating the course, or pattern, of cultural or natural history in New South Wales. As a rare substantially intact example of a gentlemen's "Hill Station" retreat, owned and occupied almost continuously by the one family since its establishment in 1870, the Wynstay estate is of State significance. As possibly the oldest surviving building in Mt Wilson, the cottage is of local significance. (Design 5 Architects) Evidence of adaptation and change manifest in the buildings, artefacts and landscape is of significance as a record of changing tastes and technologies from 1870 to the present day. It may also have greater significance as evidence of particular events in the Wynne family history. (Design 5 Architects) The place has a strong or special association with a person, or group of persons, of importance of cultural or natural history of