Yaralla was the home of Eadith Walker and her father Thomas. The estate is historically significant as one of the last large nineteenth century estates remaining in metropolitan Sydney. It is of rare State significance because it incorporates an entire 1790s land grant within its boundaries. The estate is now home to the Dame Eadith Walker Hospital.
In the 1860s, Thomas Walker commissioned the architect Edmund Blacket to design a home on the shores of the Parramatta River. This Italianate mansion became the Walker family home. From 1893 to 1899, Eadith Walker built extensions that were designed by the architect John Sulman. A stables and coach house complex were also designed by Sulman at the same time. The entire estate is now listed on the Register of the National Estate and also has a New South Wales heritage listing.
source : wikipedia
The grounds used to be used for agistment of horses but this is being changed to make a public park in the area.One to look out for in the future
The cache requires stealth as it is qjuite exposed but is a common walking area providing anonymity.