Rügen is Germany’s largest island. It is connected to the mainland by road and railway via the Rügen Bridge and Causeway. The island is known for its characteristic white chalk cliffs. Thanks to Artur for this one.
Here is a map postcard I received a few years ago.
Flensburg is an independent town in the north of the German state of Schleswig-Holstein. It was the site of the last government of Nazi Germany, the Flensburg government. Thanks to Caddi.
Lübeck is a city in northern Germany and one of its major ports. The city has extensive Brick Gothic architecture and due to that it was listed by UNESCO as a World Heritage Site in 1987.
The Speicherstadt in Hamburg is the largest warehouse district in the world where the buildings stando on timber-pile foundations. The district was built from 1883 to 1927 as a free zone to transfer goods without paying customs. It was added to the UNESCO World Heritage Site list in 2015.