The reason behind human appreciation of beauty is sometimes framed in evolutionary terms; we find a certain body type beautiful because it reflects good health, or we find a blossoming fruit tree beautiful because it can provide us with food. It is impossible to explain modern appreciation for art in simple evolutionary terms because it has been so heavily culturally constructed, any explanation for the evolutionary mechanism behind the appreciation of a Roy Lichtenstein work would be a stretch. But the roots of our contemporary aesthetic sensibilities are in this appreciation for natural beauty, which in turn was grounded in non-aesthetic value.
But it seems to me like there are so many natural things that we find beautiful that would serve no purpose, or would actually be dangerous. The Sahara desert, poisonous plants or insects, or storms are certainly considered beautiful, but an early human would be ill-advised to seek them out for this reason. Are there other theories as to the origin of our aesthetic sensibilities? Or can this question be answered by a slightly more sophisticated evolutionary explanation?