HI! We just returned from a NCL cruise that included Warnemunde. We do not do ship tours. The train station is a 5 minute walk from the ship. Having seen much of Germany, we did not go to Berlin. We took the train to Holstock. Be warned: A couple took the train on their own & the train did not make it back in time to get our ship before it left port. They had to take a 12 hour train ride( very expensive) to Stolkholm to get back on ship. Since our $ is not good against the Euro it makes trains more costly. Be sure to allow lots of time to return if you go on your own. Have a great trip!. Linda PS : We did our first ship tour of St Petersburg & were so glad we did! That is a special circumstance.