Wounded Knee Canyon on the Colo River, Wollemi National Park. This canyon is often done as a two day trip with a camp on the Colo River opposite the exit track. There are 8 abseils, with the longest about 60m in two pitches (7&8). Two 45m ropes (joined) will do all abseils.
Note: This video is for the information of those wishing to visit the canyon, it is not meant as a cinematic masterpiece, so please don't complain about the music (or lack thereof).