With all the ballyhoo over Lake Balaton I've been reminded of this video: in it a guy shows a railing right down to the water from 5.33 miles away which 'should' have about 8 feet hidden by the earth's curve. Now, as far as taking the photos goes, the methodology is good, the image is clear enough, and there aren't any issues with lasers or inaccurate measurements. I mean, not that I think this is proof of anything - but in comparison to the Lake Balaton experiment, for those who want proof, this one seems much better to me. And the real issue, of course, is that it's just one test, one little dabble, and shouldn't be used to reach a conclusion about anything. Real science, if it thought it could show something, would do this over and over again. Real science wouldn't leap to a conclusion. Real science would wonder if something else was afoot. For us, we assume some sort of refraction, and aren't threatened by videos such as this, but are interested by what's going on. In this case, as Mick shows below, it is indeed an effect of atmospheric refraction.