There was an article in our school textbook talking about the back sight of a father. It was an article about the author was heading to work out of his home town, and his father ran to the train station to bring him some fruit. He was touched by looking at his father's back side while his father walked back home. Somehow, "back sight" is in my mind all the time.
I fall in love with someone's "back sight" and it's so hard to forget. As I remember, I was so happy to follow this "back sight" by walking around the city, even it was tiring. And I am very happy now that I did capture this "back sight" I love, so that I can put it as a wallpaper of my laptop.
Hope there is one day I can follow this "back sight" to walk around the same city again! ^^