I read of a very curious, even humorous, situation when the C&S attempted an aerial photo of the Loop in 1901 via hot air balloon. I wrote a blog post about the event
here.
Does anyone know if the C&S ever acquired an air balloon shot of the loop? I've seen numerous high views of the loop, but I've always assumed they were taken from nearby mountains.
Also in the post, you'll see a great video of recent drone footage of the Loop (minus trains unfortunately). It was filmed in the winter so it creates a unique view.
Kurt