In Exeter[1], we still have roughly 70% of our Roman wall[2], and there is even a pedestrian footbridge over a road where part of the "bridge" involves walking

In Exeter[1], we still have roughly 70% of our Roman wall[2], and there is even a pedestrian footbridge over a road where part of the "bridge" involves walking along the top of the wall's remains. [1]: https://en.wikipedia.org/wiki/Isca_Dumnoniorum https://en.wikipedia.org/wiki/Isca_Dumnoniorum [2]: https://en.wikipedia.org/wiki/Exeter_city_walls https://en.wikipedia.org/wiki/Exeter_city_walls