There is also post-glacial rebound in northern Germany with several fault lines, one of them roughly between Kiel and Lübeck. Where parts of Denmark, Sweden and Norway still slowly rise, while the outer parts bordering Northern Germany slowly sink, 'scratching' against it.
Also several large salt domes, producing sink holes which can be seen as lakes today. Interestingly, some of these are being explored today as energy storage solution, what could possibly go wrong?
There is also post-glacial rebound in northern Germany with several fault lines, one of them roughly between Kiel and Lübeck. Where parts of Denmark, Sweden and Norway still slowly rise, while the outer parts bordering Northern Germany slowly sink, 'scratching' against it.
Also several large salt domes, producing sink holes which can be seen as lakes today. Interestingly, some of these are being explored today as energy storage solution, what could possibly go wrong?
edit: Besides that, flooding. Again and again
https://de.wikipedia.org/wiki/Liste_von_Sturmfluten_an_der_N...
Pick your 'fiction or fantasy' ;->