Someone did that already, in Treblinka. I just dug up some info on it to reference in another post, check it out. http://www.fpp.co.uk/Auschwitz/Treblinka/IHRJ191000.html
The jews love placing concrete and rock "memorials" over these alleged mass graves to prevent the use of ground penetrating radar that would prove their claims are complete bullshit.
(post is archived)