Leaving Hoi An, you ride north via Da Nang. Along the way you visit the Marble Mountains, where caves were used as shelters during the Vietnam War. Today local craftsmen create marble sculptures using traditional techniques. The route then climbs the famous Hai Van Pass, one of Vietnam's finest motorcycle roads. The pass offers sweeping views over the coastline, mountains and the South China Sea. In the afternoon you arrive in Hue, the former imperial capital of Vietnam. Here you visit the Imperial Citadel, including the Forbidden Purple City, once reserved exclusively for the emperor and his court.