I visited Waa with Crazytrain sometime in August last year. We were fortunate enough to face a relatively dry entrance, so we made our way into the outfall. I didn't get too many photos in the drain, but here are a few from the day.
I ended up taking most photos from within the one room, but what a nice room it was.. Once we were finished here, we walked onward.
We soon reached the mythical pipe within the drain.
Further along we were given the option to chose our path. Although we explored both of these, I neglected to take more photos. I actually found $2 down the left one, but then I forgot to pick it up on the way out. Much disappoint.
Afterwards, we visited XXXX, however I only took one quick photo. A random face on the side of the drain!