
There is a castle of the Pomeranian Dukes, which supposedly has some exhibits, but really was just a cool building to walk around. In the warmer weather they do open air concerts in the courtyard. And the space inside is also used for weddings which we saw as well.
Overlooking the city was also fun, although would have been nicer on a nice day. You could really see how green the city was with all of its parks from above.
The food was also amazing, which makes the train ride worth it on its own. For lunch we went to a brewery that opened a year ago called Browar Stara Komenda. The beer was great and the food was awesome! Not all of the food was traditional Polish but we tried a more traditional soup (I think it was a cabbage soup), bread with schmalz, and what we decided was a Polish hot pocket (only actually good).
For dinner we went to Karczma Polska Pod Kogutem, which both our Poland tour book and the hotel recommended as good for traditional Polish food. It was a bit hokey and touristy (people on one side of us spoke German and on the other side English), but the food was good. We had Bigos (cabbage stewed with pork in a bread bowl) as a starter, then Polish pierogi with bacon and barley, and pork knuckle village style. Overall, it was a lot of cabbage, but all so wonderful. The pierogis aren't at all like the ones we get in the US and in fact not what we had at the Culture Festival in Berlin either. (This was a bit of a shame, as the Berlin ones were the best.) We again had beer, which was great. We were tired from the long day and rain so we didn't move on to vodka. Some say Polish vodka is the best. I am not in a position to say, since I don't drink vodka often. But it is cheaper and they have a great variety so we did bring some home with us!
If you are visiting Berlin and don't have much time, it may not be worth going to Szczecin. There is plenty to see in Berlin and Potsdam. But if you are in Berlin for an extended stay or are living here, it is definitely worth it. I would recommend going in nice weather and maybe when you can go kayaking. It is a perfect mini getaway that makes you feel like you have gone much further. Plus you get to train through the countryside to get there.