From Finnish artist Miina Äkkijyrkkä. Photo by Juha Metso, and found on Pixdaus. Also more photos on http://www.flickr.com/photos/hugovk/2380079628/ and the artist's website http://www.akkijyrkka.com/
The St Louis arch was made by another Michigander - Finnish architect, Eero Saarinen, and the perfection of the arch in a visionary perception is just incredible to imagine. A new form of monument that had never before been made, plus when built seperately from each base and welded together at the pinnacle, without any offset, is not to be underestimated. Bravo!