~The camp referred to was Plaszow – Krakow, from whence Schindler's factories drew its slaves. The stones reputedly were used for paving within the camp, particularly around the administration buildings and officer's quarters. Unlike most KZ camps it is entirely possible that the population at Plaszow-Krakow was at least 50% Jewish (Jews represented fewer than 1/3 of total Concentration Camp inmates, 1/6 to 1/4 of KZ camp deaths and about 40% of Extermination Camp deaths). However, make no mistake that the inmates who took down the stones and disposed of the bodies were by no means all Polish Jews. Being ethnic Polish was enough of a sin to be sent to the camps. The Red Army liberated the camp in April 1945. You'll have to check with them to see what happened to the road, or more accurately, to the pavement around the buildings.

It might be easier for you to find the Jewish headstones from the Mt of Olives Cemetery that the Jordanians used for paving in and around Jerusalem between 1948 and 1967, but I'm guessing the military latrines lined with those same stones no longer exist.