In Utah, I met a lot of people that thought they had a really good sense of direction. Probably not, when they go east into the mountains, they get lost like everyone else does. In the great valley, you have the sun (almost never any clouds), the road numbers are all in reference to the Temple in SLC, and there is a huge mountain range to the east. And in most places, you can see the lake. If you get lost there, it's proof that you have a horrible sense of direction.

I looked at my tree, the leaves are pointed in the direction it gets the most sun, which isn't south. More due east. But it was an interesting experiment.