Valencia is home to the best zoo in the world. Alright, that might be too bold a claim, but the BioParc is at least the best zoo Jürgen and I have ever visited. Designed in a way that makes cages (almost) obsolete, the BioParc allows an unobstructed view of the animals, and lets you get close to them... uncomfortably close, sometimes. Let's just say, it's a good thing hyenas aren't strong jumpers.
L'Oceanogràfic opened its doors in 2003, and was an immediate hit. The price of entrance isn't cheap, but you could easily spend all day here. And you'll need to, if you plan on seeing everything. This is the largest oceanarium in Europe, with sections dedicated to the Red Sea, the Arctic, the Mediterranean, coral reefs, mangrove forests, tropical waters and the oceans. There's an auditorium, a dolphinarium, a spherical bird sanctuary and multiple restaurants. Grumble about the ticket price all you want, but by the end of the day it's hard to deny you got your money's worth.