بحيرة كونستانس
Lake Constance (, ) refers to three bodies of water on the Rhine at the northern foot of the Alps: Upper Lake Constance ("Obersee"), Lower Lake Constance ("Untersee"), and a connecting stretch of the Rhine, called the Lake Rhine ("Seerhein"). These waterbodies lie within the Lake Constance Basin (), which is part of the Alpine Foreland and through which the Rhine flows.