Neptun Express

Machine-translated from the German article

The Neptun was a train service operated from 1960 to 1995 between Germany and Denmark via the Warnemünde–Gedser train ferry. Initially it ran only between Berlin and Warnemünde, with passengers having to change between train and ferry there, as well as at Gedser, where there was a connection to Copenhagen. From 1964 the train was run through and carried across the Baltic Sea by ferry.