Haus des Meeres
Haus des Meeres is Austria’s largest aquarium, and it also might be the world’s most unique. It’s housed in an 11-story high former WW2 bunker, and also features a whole host of fascinating land animals.
It has two separate shark pools, and you can regularly watch zookeepers swimming with these misunderstood creatures. You’ll also find the likes of piranhas, jellyfish and koi. Or check out the crocs, monkeys, tarantulas or bats. And to top it off the rooftop terrace features amazing views of Vienna.
I would strongly recommend visiting Haus des Meeres to everyone.