Windows reflecting the sky at an old house near the Central Mine.
As an interesting side note, this photo has been heavily edited -- but not how you might think. This side of the house was on a steep downhill slope, so it was impossible to photograph the windows directly head-on. Instead, I photographed them on an angle, and rectified the image with Gimp's perspective correction tool. This is possible because of linear algebra, which is exactly the class which I'll be teaching later this summer!