Funny seeing that image. I scanned that very image 5 years ago and posted the scans in a thread on /hr/. That particular one shows Lake Garda. They are all from a picture book about the Aeneid from around 1860, I think. I don't have the unedited full size scans anymore, but pic related is a downsized version, just so you get a feel for the colors of the actual paper.