Take a look at this for a moment.
This is a painting by Leonora Carrington, called La Dame Ovale ("the oval lady")
Carrington came from a somewhat upper crust English background, which she threw away when she ran away with Max Ernst. She's considered one of the surrealists. Over her long artistic career - started in the 1930s and continued until her dedath in the 2ooos - she went back and forth on that.
This painting could certainly be called surreal, being filled with inversions of the natural order. The chained dog has five human breasts. (An odd number, even!) Birds and bats nest underground. Many of the trees have bizarre shapes: fox heads, chess pieces.
What I noticed after looking at it for a few minutes was that nothing could quite be taken at face value. Most of the trees are, when you take the nature of painting into account, natural. So are most of the clouds. But you're forced to keep examining them because of their proximity to the other things. Meaning that art can show you not just new things, but train you in new ways to look.