I like the angle, lighting, background, and the geometric and somewhat abstract aspect of the picture. Beautiful!!! Can you give us some details on how you shot it?
I liked the angle of the light and wanted the trunk as a leading line so to get as low as possible I laid on my back with my head near the trunk, framed the image and tripped the shutter.
I used my daily carry rig: Nikon D60 w/grip, Nikkor 18-55 mm f/3.5-5.6. I never leave home without it.