On Dec. 30, 1930, the first-ever photo of the Earth’s curvature was taken by Lieutenant Colonel Albert William Stevens, who was an officer in the U.S. Army Air Corps and an aerial photographer....
Maybe this lives in showerthoughts, but Chile has a lot of large telescopes and you often hear its because they’re on mountains above clouds. The border with Argentina goes through the middle of the mountains so it seems like it should be a good spot for telescopes too....