During the Middle Ages vineyards were added on the slopes of the Jura Mountains above the lakes. In contrast, the plains and the Grosses Moos swamp were crossed by meandering rivers like the Aare and Thielle which frequently flooded making the land hostile to settlements. The villages on the edges of the swamp, used the swamp mainly for grazing.
During the Middle Ages, vineyards were established on the slopes of the Jura Mountains above the lakes. Conversely, the plains and the Grosses Moos swamp were traversed by meandering rivers like the Aare and Thielle, which frequently flooded, rendering the land unsuitable for settlements. The villages bordering the swamp primarily utilized it for grazing.