Costas The most inhospitable coast of Denmark is one that is oriented towards the North Sea, with the problem that the region is exposed to storms of this sea, which can produce devastating floods. The lower shelf has encouraged the concealment and the formation of large gaps in correspondence to bays and nooks as in Ringk bing Fjord, the fjord and in the Nissum Bredning. The northwest coast is characterized by towering dunes up to 20 meters and can be found along the river estuaries and coastal lakes, the southwest coast instead is characterized by low islands aligned and parallel to the coast formed by erosion from the sea. The eastern part of the coast and the Jutland peninsula has numerous deep bays, the largest are the Fjord Mariager Limfjorden and who go over 30 km on earth.