You are looking for a camouflaged vitamin container with some small swag in it. Off the ground, approximately at knee height.
For some reason, this has always been my favourite part of the Blue Trail at Centennial Park. Maybe it is the low-lying area, seemingly out of place. Or perhaps it is the sparse vegetation on the ground that gives it a serene feel when you look around. Most likely, however, is that this part of the hike signals a well deserved downhill and a brief breather.