In 1962, the Vietnam Ministry of Culture, Sport and Tourism designated Ha Long Bay a 'Renowned National Landscape Monument'. Ha Long Bay was first listed as a UNESCO World Heritage Site in 1994 , in recognition of its outstanding, universal aesthetic value. In 2000 the World Heritage Committee additionally recognised Ha Long Bay for its outstanding geological and geomorphological value, and its World Heritage Listing was updated. In 2009, the New 7 Wonders Foundation, which runs the New Seven Wonders of the World program, included Halong Bay on its list of nominations as one the World's 7 Natural Wonders. According to scientists, Ha Long Bay has experienced at least 500 million years in various geological states of orogeny, marine transgression and marine regression. During the Ordovician and Silurian periods (500-410 million years ago), Ha Long Bay was deep sea. During the Carboniferous and Permian periods (340-250 million years ago), Ha Long Bay was at shallow sea level. Halong Bay Cruise discounts, cruise deals and discount Halong Bay cruise vacations from the web's largest seller of Vietnam cruises. Book a Halong Bay cruise and Vietnam cruise for less on all cruises. Discount cruise deals, last minute cruises and online Halong Bay cruise discounts