I am in love with this picture. You picked a very good angle, and framed it up very nicely.
The choice of black and white really makes the details pop out at you. This is one of those picture that really creates a mood and a feel. Something lonely, desolate, and somehow makes me feel ..peaceful and relaxed just enjoying your image.
also i am glad you decided to take the shot with the wonderful sky in the background I think that actually made the shot something more than just another pick of an old ruin. It helps to set the mood for me :
But then again I'm a huge fan of lonely, desolate and Beautiful places.