A general view of a beach in Sopot March 17, 2014. The Baltic Sea conjures up images of cold and ice, but in summer Poland's sister cities of Gdynia, Sopot and Gdansk offer travelers beautiful beaches, bracing sea air, abundant forests and plenty of history. Gdynia is a jewel of modern architecture, while Sopot, nestled along the coast between the two, is a party town favoured by Polish actors that boasts the longest wooden pier in Europe. Picture taken March 17, 2014. REUTERS/Roberta Cucchiaro (POLAND - Tags: CITYSCAPE TRAVEL)

A general view of a beach near Gdynia Orlowo June 23, 2012. The Baltic Sea conjures up images of cold and ice, but in summer Poland's sister cities of Gdynia, Sopot and Gdansk offer travelers beautiful beaches, bracing sea air, abundant forests and plenty of history. Picture taken June 23, 2012. REUTERS/Roberta Cucchiaro (POLAND - Tags: CITYSCAPE TRAVEL)

A general view of Mariacka street, the main street in the Old Town of Gdansk October 8, 2012. The Baltic Sea conjures up images of cold and ice, but in summer Poland's sister cities of Gdynia, Sopot and Gdansk offer travelers beautiful beaches, bracing sea air, abundant forests and plenty of history. Picture taken October 8, 2012. REUTERS/Roberta Cucchiaro (POLAND - Tags: CITYSCAPE TRAVEL)

A general view of the Motlawa river in the Old Town of Gdansk early July 8, 2013. The Baltic Sea conjures up images of cold and ice, but in summer Poland's sister cities of Gdynia, Sopot and Gdansk offer travelers beautiful beaches, bracing sea air, abundant forests and plenty of history. Picture taken July 8, 2013. REUTERS/Roberta Cucchiaro (POLAND - Tags: CITYSCAPE TRAVEL)

A general view of the Neptune Fountain in front of the Town Hall and Artus Court in the Old Town of Gdansk September 2, 2012. The Baltic Sea conjures up images of cold and ice, but in summer Poland's sister cities of Gdynia, Sopot and Gdansk offer travelers beautiful beaches, bracing sea air, abundant forests and plenty of history. Picture taken September 2, 2012. REUTERS/Roberta Cucchiaro (POLAND - Tags: CITYSCAPE TRAVEL)

A general view of Dluga street, the main street in the Old Town of Gdansk September 2, 2012. The Baltic Sea conjures up images of cold and ice, but in summer Poland's sister cities of Gdynia, Sopot and Gdansk offer travelers beautiful beaches, bracing sea air, abundant forests and plenty of history. Picture taken September 2, 2012. REUTERS/Roberta Cucchiaro (POLAND - Tags: CITYSCAPE TRAVEL)

The hull of the world's largest combination ferry is launched into the water at Schichau Seebeck shipyard, a subsidiary of the financially troubled Vulkan AG shipbuilding union, in Bremerhaven on July 27. The ferry, which is owned by Deutsche Faehrgesellschaft Ostsee mbh (German Ferry Company Balticsea), when completed will measure 200 metres long by 28 metres wide and will carry lorries, commercial as well as passenger railway carriages.