the new guy does have a point, sometimes, this website is just funny. oh and a lot of the time, the height of the plabe is not the olny factor in seeing curvature. say you go to 20,00 feet approaching a mountain range. the mountains are going to abscure some of the view of the horizon, whereas is you are over the ocean, nothing can get in the way or cange the shape of the horizon becaue water will always be pulled towards the centre of the earth by gravity, unless of course, the ice wall cracks