One of Lincoln's Roman remains that is no longer visible is the Westgate, which is buried under the Castle mound. The arch was, I believe, re-exposed briefly in the 19th Century. I would love to see it be re-exhumed and made structurally sound so it can be appreciated. I was part of the Team that re-exposed the Norman Westgate into Lincoln Castle back in 1987, which was great fun. In the last week of the dig the archaeologist, a massive fan of the Romans, dug straight down where the portcullis is in the Gate. A metre or so down we found the Roman West wall which hadn't been seen by anyone for the best part of 800 years. There was only a handful of us who saw it, so quite a privileged. I can say that it is still in very good condition and a mighty bit of structure. We had to bury it back in almost as soon as we had exposed it, to protect it. I hoped that it would be re-exposed as part of the Westgate development with a glass covering and lights installed so it could be seen. You could then have had a walk through Norman and Roman architecture at the same time, which would gave been quite a cool experience.