A perfect place to visit on days when the weather forces you inside, the Gdynia Aquarium is stuffed with over 2,000 creatures and pint-sized guests will delight in seeing each one. Exhibits cover marine life from across the globe, such as the common snapping turtle, clownfish, electric eel and Amazon-dwelling giant arapaima, but also delve into the evolution of submersible technology through the decades. The third floor Baltic Room is devoted to understanding the sea literally right outside the aquarium’s windows, but a history of the sea will take a backseat to the giant 44 kg cod – the largest creature ever caught in the Baltic – dangling over your head. English placards are spotty at best, so parents be prepared to make up origins for the colourful tomato clownfish and the pancake-like moonfish. A large open-air deck offers the ideal place to take in aquatic views and have a snack if the weather permits. Average visiting time: 90mins.