Nice vids, Dougo.
NGCD & Ballarat darkie are quite different from each other, yet so cool in their own way!
I loved the pillar room with the guestbook in NGCD, it's a perfect spot to sit down, chill and have some beers.
What I liked about Ballarat was the sneaky experience, being able to hear and see people on the street above without being seen. I remember we entered from where we parked our car and exited real close to a thrift shop where we bought some suits for clannies. I was also very impressed by all the eroded stones on the floor of this drain: