#2 for me. Prefer the portrait crop as when combined with the stone path leads the eye up to the end of the tunnel.
Very good detail all round and I think you've balanced the shutter speed to smooth the water just a touch, but keep its movement visible.
It looks very slightly like to leans to the right a smidge (railings and tunnel exit), but only really visible when I look for it. Others may notice it more.
I like seeing Historical presentations. I like shot #1. I think the dark wall adds to the nearly 200 year old look it takes on… Kinda like look’n through a time portal…
I really like this shot. Lots of elements: Yellow/Orange vs Green of the Tree, Old solid bricks vs dynamic motion of water and youth of the tree leaves. Great leading lines through the tunnel vs horizontal lines of the brickwork, contrast of light and dark in the bricks, arch of the roof vs straight lines...