Many Rhone River cruises sail from France’s gastronomic capital of Lyon and drop anchor near Avignon’s Palais des Papes and iconic Pont Avignon; Arles’ Thermes de Constantin and fascinating Crytoportiques; Viviers’ impressive Cathédrale Saint-Vincent; and Tain-l’Hermitage’s Petit Train des Vignes and interactive Cité du Chocolat Valrhona.