There is a very important strait in Denmark, since it separates the Jutland Peninsula with Sweden in addition to joining the Baltic Sea with the North Sea. Is named Kattegat Strait and is 220 km long. There are a large number of islands that can be seen along the strait, although Samso, Laeso and Anholt are the largest.
The name of the strait comes from two Dutch words. One is "kat" and means cat, while the other is "gat" which translates to hole. To understand why this designation we must go back to the Middle Ages. It is said that in those times it was extremely difficult to flow through its waters, because being so narrow (so much that it is sometimes taken as a bay) the formation of sandbanks was very common.
As we have already said, Kattegat fulfills a milestone function, since divide two nations, which are Denmark and Sweden. The “International Hydrographic Organization” (IHO), which is the organism with the highest international authority when it comes to setting maritime limits, considers this strait as one of its seas and gives it the number 2 as identification.