I snapped photos with every step that I took climbing the Simatai section of the Great Wall. I would preview each photo after I taking it, and none captured the sight before me—a seemingly endless stretch of stone that undulated with the landscape of the mountains that it was snaking over. I kept climbing until the path was blocked and I could go no more. I turned around and took one last photo. It's not the perfect image, but it's the one that captured the memory I wanted to preserve of this amazing experience.