The Baltic coast starts less than three hours north of Berlin by train. Here is how Warnemünde, the Usedom imperial resorts and Binz on Rügen compare for one sea day, which trains run on the Deutschlandticket, and the returns you must not miss.

Dresden is sold as the easy day trip from Berlin, and mostly it is. But the whole thing is decided by two trains, the fast one is not covered by your Deutschlandticket, and the two big museums close on different days. Here is the honest arithmetic.