Thank you for all these reviews and species lists of what really is a dark hole in terms of coverage here. Curious to see what your thoughts were on the Lisbon zoo and aquaria, as it is the only places I have visited in Portugal (same will be true for other zoochatters). I am also curiou why you chose a Portuguese zootour above somewhere else on the continent

.
No problem

I did enjoy writing these reviews (one more is coming up - Parque Biologico de Serra de Lousa), especially since I did realize the scarcity of information about those obscure places.
Personally, I liked Lisbon Zoo a lot. I understand that it may not be a top European Zoo and some parts do look dated, however I do appreciate it for what it is: a city zoo with large and diverse collection (including lots of hoofstock species and other megafauna), something that is becoming a rarity nowadays (unfortunately in my opinion). Here in the US I certainly see the decline of city zoos over the past 20 years, with massive collection reductions and homogenization, and I like that Lisbon Zoo, so far, is resisting the trend. I have heard, for example, that US zoos are not really interested in exotic bovines (gaurs, buffalos, etc.), because to build an exhibit for them you have to pretty much build a rhino exhibit, at which point you might as well just get a rhino (much more attractive for general public). Well, Lisbon does have Cape Buffalos (great rarity in the US) AND two(!) species of rhinos. Moreover, many sections of the zoo have been modernized and look quite decent. I did not really notice anything truly bad (except maybe baboon cage, and even that may work just fine for its residents). And, of course, there were lots of species that are either absent or very rare in the US, and I was very keen to see them (Iberian Lynx was the greatest highlight).
Oceanario de Lisboa was very nice. I was told by many folks that it would blow me out of the water and I understand that it is one of the top aquariums in Europe. However I've been to most of the great US aquariums (Shedd, Monterey, Georgia, Baltimore, Aquarium of the Pacific, New England, Adventure Aquarium, Newport, 2 SeaWorld parks, Mandalay Bay in Vegas, and many others), and so am kind of spoiled. Besides, I am not really a fish guy - I do appreciate a whale shark, a manta ray, or a mola mola, but overall I am much less knowledgeable and interested in fish than mammals, birds, and herps. So, while I liked the oceanarium and think its a great facility, I did not spend there anywhere near the amount of time that I spent at the zoo (for comparison, I spent almost two full days at the zoo, and maybe 2 hours max at the oceanarium). Sea otters and alcids were great, but I just went to Alaska in August, saw and photographed sea otters and two puffin species in the wild, and besides neither are really that rare in the US zoos. I did like the fact that the sea otters and alcids were easy to photograph. In the US they are usually kept behind the glass, which is more often than not is completely covered with water splashes, and the photography is very challenging. The oceanarium also had a mola mola, but it was a not so impressive immature specimen. Fortunately I have seen and photographed them in Monterey Bay Aquarium a few years ago.
Finally, Aquario Vasco da Gama is a very small and historic facility. The collection is mostly fish and inverts, with a couple of common turtles. I did appreciate the history and the museum feel of it, but it took us less than half an hour to tour that place.
As far as why I chose Portugal as my first European zoo trip country, it was pretty much a combination of circumstances

A friend of mine (with whom I was touring) was attending a EAZA conference in Portugal and asked me if I would like to join him for a tour afterwards. Before the pandemic, it was our tradition to go on an annual zoo tour somewhere, but we haven't done that for two years. And my loving wife, very kindly, agreed to let me go for a week, and took full care of the house and our two kids while I was away, for which I am super grateful! So off I went to Portugal
This summer we are planning a family trip to Europe, and my family chose Spain. My kids have never been to Europe before and are super excited to go. If everything goes well, we will spend about three weeks in Spain, two of which will be occupied with normal sightseeing (we hope to visit Barcelona, Madrid, Toledo, Sevilla, Granada), but one week will hopefully be dedicated to zoos

. I don't have anything fully planned yet, so will be posting questions on zoochat as it gets closer.