Making art is definitely NOT uniquely human.
Just off the top of my head, there are birds that collect ornaments to decorate their nests to attract a mate, fish that sculpt complex patterns into sand for the same reason, and an elephant and an ape or something that were trained to paint (by a human, so admittedly a bit of a stretch, but still)
Bears have also been observed stopping to just sit and watch a sunset/rise, so while I'm not aware of any actually producing art, there are at least examples of non-humans capable of appreciating the same type of beauty that many art forms seek to capture.