Sun Valley is located within the Blue Mountains City Council local government area, hidden in the lower Blue Mountains near Springwood.
The valley is the result of a strange geological formation known as a diatreme or volcanic vent. These volcanic remains have formed a landscape that is unique in the Blue Mountains. The surrounding sandstone is dry and rugged, while very rich soils and undulating country have provided excellent native grasslands and magnificent stands of mountain blue gum trees.
The first people to visit Sun Valley were the Aboriginal clans crossing, and living in, the Blue Mountains. It is possible that both Dharug and Gundungurra people used the valley.
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