The Kild is a river that flows from north to south through the entirety of the Region. It is the most important river in the area and supplies water, power, transport, fishing, and recreation. The Region of Kilden derives its name from this river.   The Kild is allowed to meander free through the area and is even protected as an ecological monument. In some places, the river has cut deep trenches in the landscape, giving it its unique rolling character. Multiple remnants of meanders are found in the area, even large distances from the current river flow, suggesting it had several different routes in history.   The river brings unique biodiversity, especially in waterlogged areas such as Carr. Swallows, kingfishers, and storks regularly visit the slopes and plains of the Kild.