Sticky's cave is part of a system of underground caverns and passageways that includes an underground river/reservoir and the whole thing is connected to the biscuit mining operation that Sticky has going, under the castle. We were still working on this series of pictures in the late summer of 2016.
If you are coming in from the outside entrance (eg. beside the castle moat) there is usually a boat tied up at the little dock... row the boat over to the semi-hidden watery passage-way, then follow the underground river to the loading dock. Tie up the boat and go up the steps to the shipping door. From here you'll have access to the dungeons and subterranean apartments, and from there to the castle proper. Note: watch out for crocodiles!!!
