Question: What is the name of a protected area located in the Adelaide Hills, South Australia which conserves a significant area of natural bushland and which forms a boundary to the east of Waterfall Gully near the foothills of the Mount Lofty Ranges?
Sentence (from "Waterfall Gully, South Australia"): For the most part, the suburb encompasses one long gully with First Creek at its centre and Waterfall Gully Road running adjacent to the creek.
Relevant evidence: No