Da Nang, known as Tourane by the French, succeeded Hoi An as the most important port in central Vietnam during the 19th century. Today, Da Nang's distance from other power centers, its natural endowments, (the port and proximity to Laos and Thailand), and its high degree of provincial autonomy allows for considerable local initiative. Among the Da Nang area sites of interest to visitors are the Marble Mountains, China Beach, the ancient port town of Hoi An and the imperial city of Hue.