sentences:  In 1864 Holstein became subordinate to Prussia, which soon afterwards established the district of Oldenburg in Holstein.The district consists of the Wagrien peninsula between the Bay of Lübeck and the Bay of Kiel, the island of Fehmarn, the eastern part of the region called "Holsteinische Schweiz" (Holsatian Switzerland) and the northern suburbs of Lübeck.Holsatian Switzerland is an area full of lakes and woody hills, which is shared with the adjoining district of Plön.