Things That Only Come Out At Night
On my way to the supermarket this did not exist. To be precise, the paving stone did exist, but it had no such beautiful pattern on it. But darkness arrived on my way home, and I was able to experience the happy result of a street light being placed right next to a relatively short tree.
Unlike shadows produced by sunshine during the day, this will not move from west to east. It will remain exactly where it is until morning, save for a bit of a flutter in the wind or a brief engulfment by the shadow of a passing body.
Some other things that only come out at night: