Original: There are rolling hills (the highest elevation is the Bungsberg at 168 metres) and many lakes, especially in the eastern part of Holstein called the Holsteinische Schweiz ("Holsatian Switzerland") and the former Duchy of Lauenburg (Herzogtum Lauenburg).
Simplified: There are many lakes, especially in the eastern part of Holstein called the Holsteinische Schweiz ("Switzerland of Holstein").