This morning David took Nigel, Uncle Roger and Brioni back to Kangaroo Point cliffs to explore a major city stormwater drain that empties into the Brisbane River.

Draining, April 2010
This picture is taken looking back to the mouth of the tunnel. There were large cavities in the floor that was full of clean, crystal-clear water that the group had to wade through. The beginning of the tunnel cuts straight through a rock cliff face for over half a kilometre. It was cut manually with hammers and picks before the days of jackhammers.

Draining, April 2010
Later sections of the tunnel were built with old bricks. Brioni preferred to hold Uncle Roger's hand and didn't ever express any anxiety throughout the walk. It was all a big adventure to her, even the bats!

Draining, April 2010
Nigel took this photo of the intrepid explorers about halfway through the tunnel. In the pitch-black it's a little difficult to pose for a photo because you just don't know what the photographer is up to!

Draining, April 2010
This is the other end of the tunnel where they came out. We encountered literally thousands of bats along the way.

Draining, April 2010
The tunnel ended in a pit beside a railway line.