Modderfontein Reserve seeks not only to protect indigenous fauna and flora in the area, but also to provide an attractive open space within the urban fabric where visitors can come and enjoy its natural beauty without traveling too far from home. he vision for the Reserve is to create, within an urban setting, a natural open space which is socially, economically and ecologically sustainable. The 275-hectare private park is the second-largest private park in Gauteng and includes portions of the Modderfontein Spruit, a number of dams, grassland and hills. The Reserve is operated by the Endangered Wildlife Trust on behalf of Heartland Properties. The Modderfontein Conservation Society have had input into the area for many years now and are assisting with the establishment of the reserve.