Nijo Castle trees with rock

What do you think? Is a garden architecture or nature?

That depends on your main subject! If your subject is the neatly lined and trimmed trees that form a defind shape then to me it's architecture. This photo has some other technical problems I cant tell for sure but either the DOF is off or the focus is soft. Hope this helps.

The focus is on the arching trees at the front. Everything else is out of focus (where I wanted it to be). I find large depth of field distracting. This one works well as a desktop image, giving a sense of space to my square eye.

Architecture?

a greenish flare is clearly visible. and what's that thing on the lower right corner? crop next time!

I know, I know. I guess it'd take a crop from the right. I don't know about the green flare, though. There is a green cast to the scene, but that is to the scene not the photograph.