sentences:  Among them, the most famous of the animals was Sudan, the last known male Northern White Rhinoceros in the world.Vágner's idea of exhibiting large herds of African ungulates at the Zoo was based on the concept of panoramic enclosures, developed by Karl Hagenbeck in Hamburg.A part of the Zoo's area was landscaped panoramically, with dry moats and paths between individual grassed exhibits not visible to the spectator.