It's odd that we feel this way when the opposite is closer to the truth. Citites change so much, but the forest near my house where I grew up is probably almost the same as when I left.
A couple years ago I walked a trail that the US Forest Service had developed several decades prior. There were quite some signs discussing the beautiful views out over the river valley and a lot more trees completely obscuring those views.
It's about the direct perception of impermanence, which in a timescale of a walk in a park is much more striking in nature, where everything is in a constant flux.