This one is just a little weird. Don’t ask me what’s in focus; I don’t know. Nothing, probably. But it’s the interference pattern in the staircase that gets me…

The "walls" of the staircase are made of metal, with a geometric pattern of little holes in the wall – maybe around 7mm diameter. So when you look at the sky through two of these walls, you get this cool interference pattern!

Well, I liked it!