[Photo by fdecomite.]
I stumbled across this cool project during a Creative Commons search at Flickr. Can you guess what it is?
72 Pencils Sculpture
For the making of the sculpture, look here. And this is the finished project:
Wow! This shot shows the hexagonal structure clearly:
[Project was inspired by the geometric art of George W. Hart.]
Denise Gaskins' Let's Play Math 
Wow, so beautiful!
Here is another site about math sculptures: http://www.wholemovement.com/
I also wanted to thank you for the hat tip. It felt wonderful when it came up in my blog roll.