I doubt anyone else has been to it (as Guatemala its not that interesting regarding its number of zoos), but there's another zoo inside the capital city aside La Aurora Zoo. It's called La jungla ("The Jungle"), and contains mostly native animals: neotropical otter, jaguar, white-tailed deer, central american spider monkey, etc. I think there's also a lioness, or at least they had it last time I visited
A small Dutch birdpark which I guess has been never been visited by any other ZooChatter then myself is the now closed Vogelpark Oisterwijk. It was opened 1969 under the name Vogelpark Eurobird and later renamed Vogelpark Oisterwijk. I visited the park at the end of the 1970s and althrough it was a nice park with next to the birds also some monkeys, it didn't have any special animals. The park closed 1993 and on YouTube I found a small video ( in Dutch ) about the closure of the park. Next to the interview there are also some shots of the animals which were kept at the park :
For the larger US "true" zoos, I have not been to any zoo no one else has not been to and I doubt anyone visitng US/Canadian/Australian/Western European zoos can claim to be the only zoochatters to have visited them. For the smaller "zoo facilites", I'm sure its possible at least one other zoochatter has been to some of these places, but based on the fact that they have no pictures uploaded to the galleries except my own, its at least possible I was the first to visit: Adirondack Wildlife Refuge Cox Science Center & Aquarium Everglades Alligator Farm Wellington Conservation Center For tiny, tiny nature centers (not counted as true zoological facilities to me): Anne Kolb Nature Center Marine Park Saltmarsh Nature Center
Many years ago, I visited a farm/zoo park near Wheathampstead. Each enclosure had a price for the animals. A parma wallaby cost £900. I can't find details of the park on the internet and I wonder if any other Zoochatters visited it/
I guess Bica and Natal Aquário, since those don't have pictures yet (or just from the entrance). Also Bwana Park in Rio de Janeiro, old private zoo, closed in the early 2000s
Might not be the only ZooChatter but possibly the only still active member to visit - Chew Valley Wildlife Park
The only place I can think of that almost fits, would be the late Grahame Dangerfield’s Wildlife Breeding Centre. However, it wasn’t open to the public. Maybe there were Open Days. Had an excellent breeding record.
I've visited Chew Valley Wildlife Park once in the past. It's not too far from me but I haven't been enticed back yet.
If you and FBBird are both referring to Graham Dangerfield's, then there is no chance of going back as it closed eons ago... Given the age variation of posters on here, there must be (many?) places some of the elderly visited which most contributors have never even heard of let alone visited... I am sure this has been covered on other threads about closed collections.
Maybe Gator Jungle in Plant City Florida (closed mid 1990s) and possibly the old Maine Aquarium in Saco ME. (closed 1997). The Hoedspruit endangered species center in South Africa, but I could see someone else having been there too if you were in the area.