Walden Pond was our go-to swimming spot when I was growing up. I was even lucky enough to take swimming lessons there before our town built a swimming pool.
One summer my swimming instructor decided that I needed to improve my breaststroke kick and so she made me walk up the hill to the bus after every class with my knees together. I'm not sure it helped my breaststroke kick, but it was sure good for laughs.
Then a few summers ago, I discovered that the rules had changed and people were allowed to swim outside the buoy lines. I took advantage of my new found freedom to breaststroke all the way across the pond and back.