I thought it was cool at the time too! That's why I took the pictures, shame it was a rainy day. Unfortunately, it had gone the next time I visited a few years later.
I think it went from the African Picnic lawns across that little stream to where the Hippos grass paddock now is. If the image was to pan to the right you would get the Siamang Islands (at least, I think there are now siamangs on it).