This video below nicely conveys the idea that objects in the distance — especially upon water — do not disappear from our view because of the supposed curvature of the earth. They disappear from view simply because of the laws of perspective.
The camera in this video below zooms in on a boat that is not visible with the naked eye. Now, I don’t know how far this particular boat is away from the observer, but this video shows the general idea. You can even see structures far behind the boat beginning at about 47 seconds into the video.