The sea has always had a strong influence in the region . In medieval times , storm tides made life in what is now Nordfriesland rather dangerous . Only in modern times was the loss of land and lives able to be stopped by building solid dikes . Many villages that once existed are now at the bottom of the sea . The best-known example is the small seaport of Rungholt , which was destroyed by a storm surge in 1362 . The island of Strand vanished in the Burchardi flood , another disastrous storm in 1634 . Subsequent to this storm surge , there were many small islets instead of Strand
Burchardi flood
Burchardi flood
Nordfriesland (district)