Windows through windows. I quite appreciate the straightness of the main frame - nice contrast with the less regular lines of the windows beyond. Voted earlier.
This is very expressive. All the different layers keep the eye wandering around looking for a point to find stability, which can only be found in the dark frame intersections... Strange!
cool idea. I like it. I think you couldve done without the overlay as its slightly distracting and makes it hard for me to focuz on the windows beyond. Or maybe just have done it on the borders? Just a thought but I still like it.