Actually there are three but who expects Michal to get accurate information in his posts?
Ain't that the truth!
I'm going to Sopot tomorrow afternoon from Gdansk to teach and will get off at the main station. It's the second station In Sopot. I got off at the third one once but don't remember its name.
Anyway, the main station is Sopot is not called Sopot Glowny, just Sopot. Exit the station, turn left and after a short walk you'll find yourself on Monte Cassino. Well worth a look. Stroll down it to the pier.