I don't know how many of you subscribe to MODEL RAILROADER, but mine came a couple of weeks ago (November, 2016, issue) and in it was a really good photo of a modeled Horseshoe Curve. The model railroad depicts the Pittsburgh Division of the Pennsylvania Railroad and is the model work of Dave Johnson. Dave also took the photo.
I typically don't buy the special editions that MR publishes but in this case, I might make an exception. This layout is one of ten that is featured in GREAT MODEL RAILROADS 2017. That special publication should be available at your local hobby shop or you can get it by contacting MODEL RAILROADER directly. It was to be released in mid October so should be available now.
A couple of things struck me about the photo. While the fence is too close to the tracks, otherwise, it is a pretty good depiction of the Curve as it probably appeared back in the days of steam. The rocks in the background, the trees on the hillside and the photo backdrop combine to make this a very believable scene. Of course, the other neat thing about it is that the black hopper on the extreme right side of the photo is a Nickel Plate hopper. Any picture with a Nickel Plate model in it is a "good picture." :)