Gdansk has a laid-back vibe, whilst still offering some great night life and history. As it is located on the coast, you don't have to travel far to find a beach if that's what you're looking for. Gdynia offers a sandy beach, where you can easily pick up an ice cream and enjoy the sunshine.
The main cobbled square, surrounded by beautiful coloured buildings is where it's at. Home to Neptunes Fountain and the Fahrenheit monument, the architecture is stunning and it is worth spending some time taking it all in. Make sure you don't leave the city without sampling Polish dumplings and the other local dishes that are on offer.
Finally, don't miss the chance to visit one of the largest castles in the world, Malbork Castle, which is around a 40 minute train journey from Gdansk. Spend an afternoon exploring the medieval fortress and learning about the history of the castle.