The Blue Planet is Northern Europe’s largest aquarium, located not far from Kastrup airport outside Copenhagen. It is a relatively newly opened aquarium and the location is perfect. If you have a layover in Copenhagen and a few hours to kill then this is a good idea.
It is an attraction itself just to stroll around in Copenhagen and enjoy the beautiful old city. Strøget and the waterfront is a must, but do not forget to pay all the small streets a visit too. Crazy cosy, crazy quaint and just crazy wonderful!