Source: https://www.youtube.com/watch?v=qluJ2vAnNaw I went to a Flat Earth conference and one of the attendees gave me five photos of Catalina Island and asked me to explain why it's visible if the Earth is a Globe. The details are in the video, but simply put I replicated his view in Google Earth, fitted the photo, and saw a bunch was hidden behind the curve. A couple of interesting points distinguish this example: Firstly, it's a full-spectrum photo, meaning you get more detail through the haze with the addition of infrared. Adding a 760nm (or even 720nm) filter would have vastly improved this though. I highly recommend using a filter on a full spectrum camera for this type of observation. Secondly, I often create the "flat-earth view" of a location by raising up the camera. But here I just turned off the ocean surface! This allowed me to place the camera exactly at the original view location, removing some of the differences in heights of hilltops we sometimes see. [A "flat earth view" is a simulation of what the view would look like on a flat earth. You can't get it perfect in Google Earth, but with a mountain 30+ miles away you can get something very close by raising up the camera to look over the curve. This new trick of turning off the water gives you something even closer, almost perfectly accurate at screen resolution] Catalina is an excellent demonstration of the curve, because it has a distinctive profile, and is a good distance (20-50 miles) away from beaches accessible to over ten million people.