Cheers Jimmy for the links! What is an embarrassment is that it took the zoo around a century to update several of its enclosures, but at least Lisbon is finally on board with the modern exhibitry found in many zoos worldwide.
I don't know if this old gorilla exhibit is still in use, but i think so and I bet, they keep a few new monkey species in it, to enlarge the collection. Yes, the Lisbon Director is a collector of animals....