In October 1999, a small group of Australian researchers traveled to Treblinka where the concentration camp supposedly situated, using advanced instruments they were looking for signs or prove of the mass graves.
After three weeks of investigation they found nothing, no graves, no remains, no ashes, nothing.
I uploaded the video to “You Tube” so you can watch it.
Further readings on the subject:
1– Treblinka Ground Radar Examination Finds No Trace of Mass Graves
2– Wartime Aerial Photos of Treblinka Cast New Doubt on “Death Camp” Claims
3– Was Treblinka a death camp?
4– Treblinka, Extermination Camp or Transit Camp?