I'm nearing home, with a stop at the Seattle-Tacoma airport. While passing time during my layover I wandered in to look at the bits holding together the giant window with a view to the airport operations.
This building has the coolest window structure I've seen anywhere. I've been to more than a few airports, many of them hiding all the outside activity away behind windowless walls. I love to watch airplanes coming and going and they've made that an easy thing to do with this amazing view port made of multiple sheets of glass.
Here's a shot that takes in a bigger view of the whole thing...
Shot with 40D & 12-24 @ 24mm, f4, 1/25th, iso 100.