"On my last day in Antarctica photographing emperor penguins at their nesting grounds, I came across this little hole (a little more than a foot across) in a small piece of blue ice," writes Keith Szafranski, a member of our Your Shot community. Originally hoping it would make a good frame for the landscape, Szafranski then saw a string of penguins moving toward it. "I stuck my camera with a wide-angle lens into the hole and waited."