I always liked the Tower of Babel story. Humans uniting and building a great structure. Once completed it will mean nothing will be beyond our grasp. Then God comes down, inspects it and thinks 'Nah, can't be having that,' and scatters humans across the world.
I also like the Nativity story as in the Bible, I actually wrote a play version because I got bored of the same old 5 minute skits at carol services.