Even Thomas Mann's mother, Julia, once raved about a very beautiful trip across Lake Constance. It will become clear: the connections of the entire Mann family to this lake, which came into focus for the Manns after the family's relocation from Lübeck to Southern Germany, are manifold. This exploration takes into account biographical and literary references, including the actual stays of family members, and traces experiences and impressions in the texts of the Manns: in memories, diaries, letters, and artistic works. Thomas and Katia Mann traveled to the lake numerous times, Heinrich Mann spent time recovering at Lake Überlingen, and the youngest brother Viktor reunited with Thomas here after a long separation due to war and exile. The cosmopolitan poet children Klaus and Erika also left their marks, especially Gol.