Last year I was fortunate enough to do a lot of grave hunting in the Rietfontein area, and blogged about it on a number of occasions. For those that are not aware of it, this small piece of Johannesburg is the site of at least 4 cemeteries associated with the Rietfontein Infectious Diseases Hospital.
It is a very pristine and unchanged environment which is only really marred by people who use it as a dump site. There are also in excess of 7000 people buried on the site. I was able to catalogue 3 individual burial areas with headstones, but was unable to really know the extent of the burial areas, or where the other burial areas were situated. From what I read there was a Jewish Cemetery, a Plague Cemetery and a burial area where diseased animals were buried. My last visit was in late November last year, and I recall that I did feel that all it really took was the wrong person at the wrong time with the wrong motive.