There are 4 photos below from San Diego Zoo that all show the Kopje exhibit and to be honest it is still one of the better enclosures at that world-famous zoo:
@snowleopard It is interesting that Kopjes are the one natural rock that some zoos at least are able to replicate properly, Burgers Zoo is another example. Funnily from the 4 mammals I saw on kopjes in the Serengeti, 3 seem to make the exhibit in San Diego, only Yellow-spottedbush hyrax are lacking.
@Hix It is indeed, but they are dwarfed by some in the Ngorongoro Conservation Area on the forest slopes of the crater, I saw a few of at least 20 meters high.