From your photos, this appears to be a nasty little Beaver exhibit. A lot of cement in all directions, a handful of branches, and an aesthetically unappealing pool. Would that be a fair description?
@snowleopard If I compare with other beaver exhibits I have seen (i.e. Pairi Daiza, Dierenrijk, GaiaZoo, even the former beaver exhibit at Planckendael) that would indeed be a fair description.
Bouillon is - sadly - a mix of some quite pleasing (mountain) hoofstock exhibits making good use of the park's natural terrain, and some rather unpleasant exhibits for other species. Especially the primates and predators don't get a great deal here.