Dragging it out... or Not the Greek Islands

I haven’t managed to post since last Wednesday. Despite that I’m going to drag out WIIW.

Linda said: “It looks like the edge of cement, or maybe stone, steps to me.”
It does doesn’t it? But it isn’t
Marcy agreed with “It looks like stairs with a shadow to me. It also has a Greek Island feel to it.”
Funny that you should say that, because I almost posted this part of the structure, which has a definite Greek feel to it.
But no, it is well and truly in Oz. Any last minute guesses before I post an answer tomorrow?