Lake Geneva became famous in the scientific world since the publication of the pioneer limnology book “Le Léman” by François-Alphonse Forel (Forel 1892-1904). We will take you onboard the Neptune, a boat constructed in 1904, the same year Forel's book was published, for a short journey through the geological and sedimentological history of the lake. We will show you how the Leman and humans societies, including the palafittes (UNESCO world heritage), interacted through time and how several tsunamis swept over the lake. We will also take the opportunity of the breathtaking view over the surrounding landscape to discuss how the Rhone glacier shaped the Geneva basin during the last glaciation. We will finish the visit in the old Town of Geneva visiting the archeological site of St. Peter's cathedral