In Athens, Greece my favorite example of this is where you walk over the ancient city walls.

There is a section of wall revealed by a dig in Kotzia square[1]. The nearby paving traces the walls, and further on the National Bank is raised up so you can see the wall continuing on.[2]

[1] https://www.google.com/maps/@37.9818329,23.7288448,120m/data... [2] https://www.google.com/maps/place/Acharnian+Gates/@37.980860...