Pont du Gard
Created by Roman Engineers (and local slave labour no doubt) as a small but significant part of a project to supply water to Nimes. If memory serves, we were told that the watercourse is some 50 Kilometres long. The engineering skill was such that only in the 17th century had the knowledge been relearnt in Europe.
This image is created from a sequence of 12 shots and the original of this downsized version is massive, with real depth of detail.
I am surprised how well this all went together. The individual shots were were all handheld and I made no attempt to stop the cameras auto white balance doing its own thing. I always assemble these things myself, as no automated panorama software I've yet used gives as good results. But yes, it really is as slow as it sounds!
Shot using a 24-70 L lens at 50mm, 1/500s @ f/9 or thereabouts depending on what I wanted from various sections, ISO was set at 320.