Carouge is also the story of two rivers: the Drize, a small stream, which runs for 8km from its source at the foot of Mont Salève and the Arve which carves sharp riverbanks before joining the Rhône. A green area, proud of its riches: a variety of flora and fauna. Come to know the hydraulic engineering history that shaped the development of this city, and the measures taken to preserve this exceptional environment. Private guided tours 7 days a week, pre-booking required, groups from 2 to 20 people. Reservation required.