I think that the series of enclosures here (for Fishing Cat as well as civets) were previously old pits. One side has been replaced by a window - from where this photo was taken - and some mock-rock slapped over the walls.
They look quite nice really, although there is little in the way of furnishings inside the enclosures. The doors to the night shelters were open (everywhere in the zoo) so the animals could come and go freely.
