Barcelona Zoo is a nice place to spend an afternoon. It’s situated in the green lung of the historic old Barcelona, the zoo first opened in 1892. It’s big, with a wide range of animals, it covers most of the main groups that you expect to see in a zoo from reptiles and birds through apes, monkeys, deer, tigers and lions, hippos, elephants to a small dolphinarium. And for the kids there is the possibility to make a pony ride. See link.