On a clear day recently, I was looking at the view towards the east, and saw a small, white, cumulus cloud on the horizon.
But soon, I noticed that this cloud was more than a little strange. For one thing, it was the only cloud in the sky. And when I looked back a little later, its position and shape were exactly the same as before. Furthermore, it had a weird shape for a cloud. Its upper edge was jagged and well-defined. But its lower edge was perfect straight, but fuzzy, as if the cloud were gradually thinning out of existence instead of ending at a certain point in space.
Suddenly, I realized that this was no cloud. I was looking at the snowy peak of the Hermon mountain, 100 kilometers away, rising above and through the haze on the horizon.