Wonderful. Something about that POV makes me feel like I'm actually there, craning my head back and looking up at the dizzying heights. That, combined with the elegant lighting, beautiful shadows and rich tones, makes this a superb shot. I love it. :)
Beautiful angle, and great lens choice! Looks like a giant spiderweb. Could easily just be the natural colors, but if you toned this, that looks great too! STRONG work!
almost feels like your falling into the image. I don't know if I like the duo tone tho. I know you can't do this in basic but a vignette on this would work well in my opinion.