It's interesting to see how you really understand your chosen theme after you see the great images submitted. I feel that virtually all of the photographers who entered this contest had interesting entries - a lot of creative juices out there! In the end, I seem to have fallen for simplicity and contrast; though not always.
Honorable mentions, in no order:
Luxun's nice monochrome treatment:
Alain's photo is well crafted, though I might wish for less foreground...
A cool image from John Medlin:
Markus continues the theme:
Steve Maz's nice contrast, colors, and curves:
Extra points to Pawel for a creative angle:
Peter's eye-catching colors and contrast:
Flo Hendry has an unusual take:
Third Place: I have been a sucker for MC Escher views ever since my mid-teen years (looking at Escher's drawings with headphones while listening to Traffic, Yes, or Led Zeppelin). Kudos to Walter for bringing me back there so expertly!
Second place: This image from Alla Gilbourd is not only pleasing to the eye, but also has the shadow as metaphor of the child growing into an adult.
First place: The ultimate in simplicity, design, and grace. Every line in the image is made from a shadow. Congratulations Marcel, you win this one!