Wynstay Estate is a heritage-listed farm located at 68-78 The Avenue, Mount Wilson in the City of Blue Mountains local government area of New South Wales, Australia. It was designed by Richard Wynne and built from 1875 to 1893 by Joseland and Gilling; Turkish Bath house by Earnest A. Bonney. It is also known as The Turkish Bath. The property is privately owned. It was added to the New South Wales State Heritage Register on 12 April 2002.

Mount Wilson is a village in the Blue Mountains region of New South Wales, Australia. The village is about 14 kilometres (8.7 mi) east of the township of Bell, and about 100 kilometres (62 mi) west of the Sydney CBD. At the 2021 census, the village of Mount Wilson had a population of 81 people.