Dale Chihuly currently has an exhibit in Boston. The organic glass forms are inspired by nature. I tried to build such an organic structure in Mathematica by drawing 200 parametric surfaces along spiral paths leading from the center outwards. To build the structure the TNB frame is crucial. This is how the surfaces are drawn: If r(t) is a curve, then
r(t,s) = r(t) + cos(s) N(t) + sin(s) B(t)
defines a surface which is a tube around this curve. Click on the picture or second picture to see a 1600x1600 pixel version.

And here are the glass sculpures of Chihuly:

The following photos are from Xinxin Xu