Thought I'd have my first attempt at a bit of "draining", found a nice place to start at Beaudesert Hall. This storm drain runs from the bottom pond out into a massive valley. Battery got low so flash refused to work after a while, but managed to get a few quick snaps...
Entrance / weir into drain:
Going in over the weir:
First youre greeted with this small chamber:
At the side of the chamber is this hole:
A small set of steps leads down into another chamber:
Which leads to the main tunnel:
Its not a very long tunnel:
So quickly reached the other end (looking back):
Bit stoopy all the way down, this is the other end in the valley:
Thats it for now!