In regards to the 2nd picture.
I really like the composition - C&O canal in Georgetown is a great place to take pictures.
You have cropped this to an uneven dimension - which will male it harder to frame and is a little uneasy on the eyes. Also There is a lot of featureless sly, inevitable on a cloudy overcast day. I would do a couple of things to touch this up a little.
1) level the bridge so it doesn't attract the eye.
2) crop to 6 w x 4 h, leaving out as much as possible of the sky and making the path run from one corner.
IMO, this tightens up the picture a bit.
Redo sent by PM.
Would be happy to post it if you allow.
Lew