It didn't take me long to figure out they made me think of the balconies on the building that made a brief appearance in the last scenes of one of my favorite flicks, Michelangelo Antonioni's L'Eclisse (1962):
They're not exactly the same:
But seeing the building against the sky like that still made me think of it:
So yes, while I was baking in the sun, I couldn't help but think about the bleak ending of an Italian film about incommunicability. And I loved that! I need a break from work from time to time, but not from my passions.