Ha Long Bay, the only place recognized twice as a World Natural Heritage by UNESCO and listed as one of the new 7 natural wonders of the world. With the largest number of islands in the country, accounting for nearly two-thirds of total islands in Viet Nam, covering an area of 1,553 km2 with 1,969 islands, Ha Long Bay has outstanding values, especially landscape, geological and morphological values. The eternal and magnificent beauty of Ha Long Bay is created by three elements: Stone, Water and Sky. This is a privilege of nature for Ha Long, which no other sites in the world obtain. With such unique values, Ha Long Bay has been recognized twice as the World Natural Heritage by UNESCO and surpassed more than 400 wonders from over 200 countries and territories to be inscribed on the list of new seven natural wonders of the world.