My favorite historical thing in York was seeing the Roman foundations under the cathedral (York Minster). You can see a similar thing next to the cathedral in L

My favorite historical thing in York was seeing the Roman foundations under the cathedral (York Minster). You can see a similar thing next to the cathedral in Leon, Spain (whose name came from "legio" for Legion, since it was originally a Roman army camp, rather than "Leon" meaning "lion" as it's called now.)