Gdynia is a relatively young city, founded in the 1920s in place of a former fishing village. It's located near the city of Gdansk and it's one of the country's main sea ports. The maritime heritage of the city can be seen in architecture, with many buildings resembling ships. Visit the Polish Naval Museum and Dar Pomorza - an old sail training vessel for the Naval Academy. Take a stroll on Orlowo Pier and relax on a sandy beach - or take a short train ride to Gdansk.
Saint Petersburg is Russia's second largest city, a cultural centre and an important port on the Baltic Sea. Founded in the early 18th century, the historic center is a UNESCO World Heritage Site and the the Hermitage is one of the largest and best-known art museums in the world. You could spend days visiting it. Don't miss the monumental Church of the Savior on Spilled Blood. You can also take a trip to the Peterhof Grand Palace and later relax in its gardens.