This image of the St. Louis Arch has a wonderful combination of jagged, organic lines and smooth, man-made lines. I also like the contrast of light and dark areas of the frame, and the near absence of color. If you've never been to the Arch, it's totally worth the trip. Did you know you can ride a tram, inside the arch, to the top? At 630 feet, it's the tallest inhabitable structure in St. Louis.
A thin layer of ice glistens off of tree limbs as the Gateway Arch rises in the background Saturday Jan. 13, 2007, in St. Louis. A crippling winter storm lashed the central part of the nation with another blast of freezing rain, sleet and snow Saturday, causing widespread power outages and tying up highways and airports. (Charlie Riedel / AP)