If the World was Round Wouldn't the Horizon be Curved?
One easy way to prove that the Earth is flat is just to look at the horizon. Notice how the horizon is flat and not round? No matter how far up or how far away you look, you cannot see the curvature of the Earth. Even from very high altitudes like Mount Everest you cannot see the curvature of the Earth
Above is a picture of the horizon seen from the summit of Mount Everest. Do you see a curve in the horizon? I don't. This argument is probably one of the easiest ways to debunk the myth that the Earth is round. At an altitude of over 29,000 feet Mount Everest is the tallest mountain in the world. At an altitude of 29,000 feet you should see a curve in the horizon of the Earth. However at 29,000 feet the horizon is straight. A vast majority of the world is told that the world is flat, and this myth is strengthened through photoshopped images of Earth from space and terribly inaccurate globes. If you are part of that 99% I ask you to take a harder look at why you believe the Earth is round.