Comment by lukecarr

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 [2]: https://en.wikipedia.org/wiki/Exeter_city_walls