Barcelona zoo barcelona zoo is one of the top 10 attractions in barcelona and offers a great day out for all of the family it is situated in the greenest area in barcelona the beautiful ciutadella park a great place to spend some time before or after the visit to the zoo in 13 hectares the zoo houses 1000s of animals of over 400 species many of which are endangered species that you would not find elsewhere barcelona aquarium laquarium barcelona aquarium has got to be the worlds