The Drac is a small river and may appear harmless, but the level of water may change quickly, especially when the dam upstream releases water.
Avoid the Villeneuve area at night the tram stops La Bruyère, Arlequin, and Grand'Place as well as Village Olympique.
Be aware of pickpockets on the tram and bus lines; though petty theft is not common in Grenoble, it does exist.
