When we look into a well, sometimes we simply see our own reflection. Photo by Prof saxx (talk) - self-made, CC BY-SA 3.0, https://en.wikipedia.org/w/index.php?curid=17148293
A group's reflection in a well. Photo by Prof saxx (talk) - self-made, CC BY-SA 3.0, https://en.wikipedia.org/w/index.php?curid=17148293