- The geographical position of the village of Dortan, in limit of Ain and Jura, Haut-Jura Park, made a strategic point for all leisure: Saint-Claude, the capital of pipe in 20 minutes, Oyonnax 7km, ski resorts, the neck of the Sickle, Geneva and Lyon about 1 hour, the lakes and beaches 20 minutes...
- Earth Sequani, Roman and Burgundian, Dortan remains marked:
- By the Middle Ages as evidenced by its castle, the ancient fortress of the eleventh century built to defend the passage of the Roman road Lyon Saint-Claude.
- And especially by World War II which made Dortan, burnt by the Nazis July 21, 1944, a martyred city whose castle was the only habitat spared by the fire and served as a refuge for the villagers.
- Dortan, capital of chess.