DislikedFor me the most obvious way to visualize why the Earth is not flat is the existence of horizon. If the Earth were flat, the world would be a very strange place and would look differently. For example, there would not be a good reason why from Portugal you wouldn’t be able to see the Rocky Mountains with a telescope on a clear summer day. And yet, you just see the water waves on the horizon. If the Earth were flat, this would mean that the waves were much taller than the Rocky Mountains (as they obviously stand in between the observer and them)....Ignored
Once You See, You Can't Unsee But You Will Get The Odd Poke In The Eye