I think the first has a decent composition, you've got 2 sides of the ruin nicely. It is a little dark but I think that using the shadows/highlights dialogue in Elements would lift the darker areas and you'd still maintin the clouds. I would fix the verticals in number one as they are leaning in and converging, which is very common with a low down angle like this. All 3 are tight in the frame.
Some nice detail in all the images, it's amazing how images that don't always work in colour are transformed by a mono conversion.