UK airports don't go much on public art - maybe a corridor of photos - preferring the lucrative safety of artistic advertising. In the US airports seem more like public spaces: not just bigger, cleaner, brighter but decorated. The iron wall of wooden staves at Seattle is odd but it does help you spot where you are in the terminal and the series of mosaic pillars was quite beautiful.
There was some fun art in the Bellevue Square mall: a series of painted fiddles done to raise money for the local philharmonia. Some twee, some jokey and some quite lovely.
Mary on a Blackberry so pardon typing errors