So, if you get a combined ticket to the Aquarium, the Bigo lift, and the Biosfera it's worth going…read morein. Otherwise I wouldn't waste 5 Euros just to walk around inside. It's quite small - you can literally walk the loop around inside in a minute - and there isn't that much to see. The pink ibis birds mostly hang out way up high, you'll see a turtle and a parrot, some insects and small fish, but that's about it. If you're expecting a botanical garden tropical greenhouse you'll be disappointed. It's cool to look at from outside but that's about it.