How are you dear friend @ewkaw good afternoon
I don't blame you for not knowing what to call it, I would also have the same dilemma. What a beautiful structure, its shape and texture is ideal for monochrome shots. Excellent shots.
Have a splendid day
I am sure there is a proper name for it. But I like to make up names so will leave it as it is for now :)
Thank you and have a great weekend :)