Firefly Creek has its headwaters on the western side of Island Mountain, 2.8km south east of Newnes. It flows in a generally north east direction for 2.9km to its junction with the Wolgan River. Within Firefly Creek is the canyon known as Firefly Canyon. This canyon was found by David Noble and Tom Williams in 1977 on a Springwood Bushwalking trip; they had noticed fireflies when they camped above the canyon. This canyon contains four or five short abseils. Reference: Jamieson, Rick. Canyons near Sydney, 1993, p. 40.