I always found cloud reflections on the glass buildings very fascinating. With a little bit of observation power and a little bit of luck, they can make rather striking images. I took these two pictures at about the same time during a trip to Chicago a few years ago. Both of them were taken from a boat crusing through the Chicago river.

You can click on a picture to see a larger view in a pop-up window. Here are the links to the photopages of the last few weeks : 1, 2, 3, 4, 5, 6, 7, 8, 9.