The door!

My wife and I went out for lunch today - a visit to Daft Eddy's on Sketrick Island.  Beside the restaurant is the remains of Sketrick Castle and I took the opportunity to photograph the rear door to this ruin.  Looking through the door you see stairs to the left, access to which is blocked.  But this dark stair passageway introduces a level of mystery - where did it lead to?  This was the compelling reason to take the photograph.