8.11 morning: Baden-Baden is one of the few high-end spas in Europe, and the German word for bathing means that the characteristics of the city become its name. As early as the first century AD, the ancient Romans found a mineral spring with a temperature of 69 ℃ in the valley, and used this spring to treat the soldiers' illnesses and wounds. The Baden Hot Spring was named after the Roman emperor Caracara who enjoyed the hot spring in 213 AD.