The plateau
We can see colored leaves in the plateau at this time.
Although the plateau of this time is a little chilly, we can see not only the colored leaves but also the Japanese pampas grass and so on.
We can feel the indication of fall when we are in the plateau.
By the way, there seems to be a meaning "stagnation" in word "plateau", too.
I want to enjoy the stagnation of my life, too.