I don't think I've made a contribution to this list yet! Counting butterfly houses, aviaries and farms with exotics in as well. Prepare for rambling
This is off the top of my head so I might have left off the odd place, but these are the ones that stick out the most for me.
Canada
-Toronto Zoo (Toronto, Ontario) (been going there since the 1980s, still one of my heart zoos and I have many favorite animals at the zoo; I have seen many changes (good and bad) throughout the years and mainly go on Christmas Eve but now I have a seasonal pass to here or Safari Niagara so I do plan on visiting more in 2018)
-Killman Zoo (Caledonia, Ontario) (smallish zoo with a specialty towards felines; been going since a child of the 1980s as well; about 20 minutes from where I live; the enclosures aren't fancy but the animals are well looked after in spite of ARist propaganda and some of these animals here were pulled from less than desirable situations)
-Niagara Butterfly Conservatory (Niagara Falls, Ontario) (been going since early 2010s; lovely HUGE place that can get very busy; they also have huge Atlas Moths which are a big draw to many visitors)
-Cambridge Butterfly Conservatory (previously known as Wings of Paradise) (been going since the early 2000s, lovely little place, more intimate than the Niagara Butterfly Conservatory; it's been a while since I've visited).
-Bird Kingdom (Niagara Falls Ontario) (previously known as Niagara Falls Aviary; lovely place where you can walk right past birds of varying species in free-flying indoor aviaries, some have nests built right on the edge of the walking paths!)
-Marineland (Niagara Falls, Ontario) (only went on a school visit in the 1980s)
-Unnamed (?) farm in Stoney Creek, Ontario, had llamas back when they were more exotic and rare as well as bison and deer species; farm and animals were sold following a divorce; there still remains of the fence and gate; the house burned down. Used to visit this place in the 1980s with family. Pity it was closed down, it almost appeared the place was going to turn into a proper zoo (I was a major zoo fan even back then!) but then the divorce came and that ended that.
-Bowmanville Zoo (Bowmanville, Ontario) (only went once on a rainy day in the early 2000s to visit the lions that played the maneaters of the Ghost and The Darkness) (now closed)
-Ripley's Aquarium (Toronto, Ontario) (been going since 2015) (annoying flashy electronics aside, a class act where you can at once find yourself surrounded by sharks, rare sawfish and stingrays and an assortment of fish all at once; also has some other rare species like Paddlefish which I'm in awe of with each visit and I love getting my hands cleaned by the Cleaner Shrimp!)
-Safari Niagara (formally Zooz) (Stevensville, Ontario) (been a yearly visitor since going in the mid 2000s, I have seen the zoo grow from very basic and smallish enclosures to much more expansive enclosures for lions, tigers and black and brown bears; they have their usual staple of giraffes, lions, tigers, parrots, to more exotic from African Wild Dogs, Indian Rhino and wildebeest; it's a nice place that also serves as a recreational park for fishing, boating etc and concerts in the summer).
-Hamilton Aviary (Hamilton, Ontario) (once located at Dundurn Castle; moved to Gage Park in the early 1993; housed/houses a variety of birds from budgerigars to different parrots; volunteer run, closed at the moment for issues related to the housing of the birds and it is planned that a new facility is to be built)
United States
-Seaworld (Orlando, Florida), one of my earliest zoo memories in the 1980s was going here as a small child with my family and being in awe of the sharks that swam above me as we went through a tunnel. And of course being delighted in the penguins and dolphins and Orcas.
-Lowry Park Zoo (Tampa Bay, Florida) (beautiful zoo that is geographically organized; I can recall this was the first place I laid eyes on Sumatran Tigers right as my tiger devotion was growing and being in complete awe of them; visited again for the first time since the early 1990s and it was just as wonderful as I remember it being; only freshened up)
-Waccatee Zoo (Myrtle Beach, South Carolina) (visited in the late 1990s/early 2000s) (strange and interesting place, it's like the combination of a zoo and a farm and the enclosures weren't anything fancy but the animals were well looked after from what I can remember)
-Busch Gardens (Tampa Bay, Florida) (it has been many years since I've last visited in the early 1990s but I loved it; I fondly recall feeding a baby giraffe named Patricia and being in awe as I watched tigers from a viewing platform, and adoring the Koalas on their visit)
-South Carolina Aquarium (Charleston, South Carolina) (absolutely wonderful facility with a sea turtle hospital that goes above and beyond in saving these special creatures; wonderful collection of mostly native species but does have special exhibits; I once visited when they had a feature of rainforest animals and exhibited a Tamandua)
-Mote Marine Science Center/Mote Marine Labratory (Sarasota, Florida) (fantastic place that is choc full of education about the importance of the marine ecosystem with a wide array of species from Manatees to tiny shrimp; they do a lot of important research here and also get involved in rehabiliation efforts; I like how some part of is outside and there is a cafeteria that overlooks the quarentine area; I visited and loved as a little girl in the early 1990s and then again in my last visit in 2015; it seemed to have expanded since I've last visited)
-Clearwater Aquarium (Clearwater, Florida) (another top class aquarium, though a smaller collection than Mote Marine and an older facility; there are plans for massive upgrades and it is famous for it being the home of rescued dolphins "Winter" and "Hope", who I observed going through behavioral enrichment training when I was visiting there in 2015; they also do important rehabilitation work)
-Monterey Bay Aquarium (Monteray, California) (visited in 2012; perhaps the aquarium that has blown me away the most; the huge main tank was beyond impressive and I was shocked by their collection of jellies and seahorses; I had no idea there was such a variety of jellies!)
-North Carolina Zoo (Asheboro, North Carolina) (visited in the early to mid 2000s; easily one of the nicest zoos I have been to with wonderful naturalistic enclosures and also the place where I first laid my eyes on African Wild Dogs in person, one of my favorite species).
-Riverbanks Zoo (Columbia, SC) (another nice place that I visited in the early 2000s on our way to vacationing to Charleston, SC, they had a nice number of species in nice enclosures and even had some obscure species like Black-footed Cats).
England -
(from a single visit in 1999)
London Zoo (London, England), (a wonderful little zoo; at my time of visit they still had their elephants and I believe rhinos; it was there I also laid my eyes on the first Okapi (my second time was seeing them in Lowry Park in 2015), and was very impressed that they had so many species in a little area and there was a nice, casual feel to the place)
Whipsnade Park (Whipsnade, England) (beautiful, pastoral park that while modern, had a certain pastoral, old-times feel to it while feeling completely natural; the brown bears were kept behind a fence that must have been there since the park opened yet the enclosure itself was natural for the bears to go about their bear-y business and I recall spending a good deal of time; observing the wolves was also very much like watching them in the wild; they were very active in their naturalistic enclosure).
-Battersea Park Children's Zoo (London, England) (lovely little park; I don't recall there being too much in the way of a variety of species but it was nice for a easygoing walk through; I remember otters and wallabies, possibly meerkats as well as livestock).
