Jasenovac concentration camp
The living conditions in the camp were terrible, as was usual for Nazi death camps.  Prisoners were fed very little, not given enough clothing or shelter to stay warm, had no health care, and were abused by the Ustaše guards.  Also, as in many camps, conditions would be improved temporarily when special groups visited.  For example, when members of the press visited in February 1942, and later when a Red Cross delegation visited in June 1944, the prisoners were treated better until the visitors left.  Then the living conditions would go back to usual.