I visited Gdańsk many times, the city is famous for its beautiful architecture, old churches and museums. I highly recommend visiting National Maritime museum in Gdańsk and Museum of Second World War. I also spent 5 months in Sopot - a beautiful resort town on the Baltic Sea, just 10 km from Gdańsk. Worth visiting in summer. Gdansk, Sopot and Gdynia form “Three city” area, one of the best parts of Poland.