You have some very strong images there. The B&W and mono-chrome conversions are well done. I like the first, second and fourth images. Don't care for the third image too much. The fourth shot could be lightened a bit to show more detail in the bridge.
I miss Maine. I used to live in Dover on the Maine/New Hampshire border and we spent a lot of time of our summers in Maine when I was younger.
I think three might be my favorite of your set. The left gutter really leads the eye up the wall and across the texture. I guess this is a great example of how subjective all of this can be.