The landscape of our horizon changes too but because it takes years before it is noticeable, we actually did not see the changes. To me the only way for us to see those changes is to photograph it over times and keep it for the next two or three generation to watch it. I believe they would notice the changes of the scene if they compare with the same scene in the photograph in say a hundred years from now.
The above image is a simple scene and I am posting it here for all to enjoy. Even in this photograph, as we move things around it would not remains the same as it was when this image was taken.