Hügelland
Hügelland is a type of landscape consisting of low rolling hills whose topography or surface structure lies between that of a lowland region (plains or river terraces) and that of a more rugged hill range or low mountain range. The term is German and has no exact equivalent in English, but is often translated as "hill country", "hilly terrain", "upland(s)" or "gently undulating" or "rolling country", or "rolling countryside". It is derived from "Hügel", a low hill or hillock and appears frequently as a proper name for this type of terrain. The term "Hügelland" is not unambiguously defined, even  in German. For example, on the plains of North Germany, Poland or Hungary it may be applied to terrain with a height variation of just 50 metres, whilst in the Alpine Foreland or in the Voralpen it might refer to terrain with a height difference of at least 100–200 metres. On the other hand, some scholars prefer to define "Hügelland" by its height above sea level; for example, applying it to terrain between 200 and 500 metres above sea level. Structure. Structurally and geomorphologically, a "Hügelland" landscape has a significant proportion of less well-defined components. For example: Hills and  mountains are caused by folding along tectonic weaknesses or fault lines, which are then followed by rivers. This results in a parallel pattern, which can be made even more regular through erosion. "Hügelland" rarely exhibits these properties. When the gently rolling hills of a "Hügelland" are suitable for agriculture, their small-scale nature is further reinforced, which may result in a colourful succession of mixed forest and open areas with pastures, meadows, arable crops and orchards, divided by hedgerows along the tracks, lanes and embankments. Mixed woodland, hedges, ponds and scattered settlements occur, giving the appearance of a mosaic from  the air. Regions named "Hügelland". The regions listed below have "Hügelland" as part of their proper name. Several also have alternative English-language names. Similar concepts. An example of "Hügelland" outside Europe is Rwanda in Africa, whose character is expressed by its French name of "Pays de Mille Collines" ("Land of a Thousand Hills"). In Sweden the term undulating hilly land () is used since Sten Rudberg coined the concept in 1960. In the Swedish context this means hilly areas made up of crystalline rocks of the Baltic Shield that are often contrasted with joint valley landscapes, the Sub-Cambrian peneplain  and plains with residual hills. In southern Sweden the undulating hilly lands are coterminous with the Sub-Mesozoic hilly peneplains, an ancient surface formed by weathering in warm and humid climates during the Mesozoic.