Covering an area of 43,400 ha and including over 1600 islands and islets, most of which are uninhabitated and unaffected by humans, it forms a spectacular seascape of limestone pillars and is an ideal model of a mature Karst landscape developed during a warm and wet tropical climate. The property’s exceptional scenic beauty is complemented by its great biological interest.

The outstanding value of the property is centered around the drowned limestone karst landforms, displaying spectacular pillars with a variety of coastal erosional features such as arches and caves which form a majestic natural scenery. The repeated regression and transgression of the sea on the limestone karst over geological time has produced a mature landscape of clusters of conical peaks and isolated towers which were modified by sea invasion, adding an extra elemant to the process of lateral undercutting of the limstone towers and islands.

Established as the capital of unified Vietnam in 1802 CE, Hue was not only the political but also the cultural and religious centre under the Nguyen Dynasty, the last royal dynasty of Vietnamese history, from 1802 to 1945 CE.

The structures of the Complex of Hue Monuments are carefully placed within the natural setting of the site and aligned cosmologically with the Five Cardinal Points (centre, west, east, north, south), the Five Elements (earth, metal, wood, water, fire), and the Five Colours (yellow, white, blue, black, red).

The central structure is the Hue Citadel area which was the administrative centre of southern Viet Nam during the 17th and 18th centuries CE. Within the Hue Citadel were located not only administrative and military functions of the Empire, but also the Imperial Residence, the Hoang Thanh (Imperial City), the Tu Cam Thanh (Forbidden Purple City) and related royal palaces.

Outside the Capital City there are several associated monuments of importance. In the outlying areas were located important ritual sites related to the spiritual life of the dynasty such as the Van Mieu (Temple of Literature), the Dan Nam Giao (Esplanade of Sacrifice to the Heaven and Earth), the Ho Quyen (Royal Area), the Den Voi Re (Temple of the Roaring Elephant), and the Chua Thien Mu (Celestial Lady Pagoda).

Located within Ninh Binh Province of North Vietnam near the southern margin of the Red River Delta, the Trang An Landscape Complex (Trang An) is a mixed cultural and natural property contained mostly within three protected areas; the Hoa Lu Ancient Capital, the Trang An-Tam Coc-Bich Dong Scenic Landscape, and the Hoa Lu Special-Use Forest. The property covers 6,226 hectares within the Trang An limestone massif, and is surrounded by a buffer zone of 6,026 hectares, mostly rural land with rice paddy fields. There are about 14,000 residents, the majority of whom are families involved in subsistence agriculture, but much of the property is uninhabited and in a natural state.

Trang An is of global significance as an outstanding humid tropical tower-karst landscape in the final stages of geomorphic evolution. It is composed of a variety of classical karst cones and towers and a network of enclosed depressions connected by an intricate system of subterranean waterways, some of which are navigable by small boats. The area is unique in having been invaded by the sea several times in the recent geological past but is now emergent on land. The blend of towering mountains draped in natural rain forest, with large internal basins and narrow cave passages containing quietly flowing waters, creates an extraordinarily beautiful and tranquil landscape.

Archaeological deposits in caves reveal a regionally significant, continuous sequence of human occupation and utilization spanning more than 30,000 years. There is convincing evidence showing how early human groups adapted to changing landscapes in the massif, including some of the most extreme climatic and environmental changes in the planet’s recent history.

The Citadel of Ho Dynasty built in 1397, composed of the Inner Citadel, La Thanh Outer Wall and the Nam Giao Altar covers 155.5 ha, surrounded by a buffer zone of 5078.5 ha. It is located in accordance with geomantic principles in a landscape of great scenic beauty between the Ma and Buoi rivers in Vinh Loc district, Thanh Hoa province of Viet Nam.

The castle is rectangular in shape. Its north-south side is 870.5 m (2,856 ft) in length and its east-west side is 883.5 m (2,899 ft) in length. There are four gates: one at the south (fore gate), one at the north (back gate), one at the east (left gate), and one at the west (right gate). The southern gate is 9.5 m (31 ft) high and 15.17 m (49.8 ft) wide.

The castle was constructed from stone blocks, each of which is 2×1×0.7 m (6.6×3.3×2.3 ft) size on average. Except for its gates, the castle is mostly ruined.

It demonstrates the use of architectural elements in terms of space management and decoration designed for a centralized imperial city in order to show a concept of royal power, based on the adoption of the Confucian philosophy within a predominantly Buddhist culture.

The Citadel was inscribed on UNESCO World Heritage Sites on June 27, 2011.

The Phong Nha-Ke Bang National Park covered 85,754 hectares. With this extension, the site covers a total surface area of 126,236 hectares (a 46 % increase) and shares a boundary with the Hin Namno Nature Reserve in the Peoples Democratic Republic of Laos.

The Park’s landscape is formed by limestone plateaux and tropical forests. It features great geological diversity and offers spectacular phenomena, including a large number of caves and underground rivers.

The site harbours a high level of biodiversity and many endemic species. The extension ensures a more coherent ecosystem while providing additional protection to the catchment areas that are of vital importance for the integrity of limestone landscapes.

The Sơn Đoòng Cave, which was discovered in the 2009 survey by British and Vietnamese explorers, is considered the largest cave in the world. Even before this discovery, Phong Nha held several world cave records, including the longest river as well as the largest combined caverns and passageways.

This national park was listed in UNESCO's World Heritage Sites in 2003 for its geological values as defined in its criteria viii. In April 2009, the world's largest cave, was re-discovered by a team of British cave explorers of the British Caving Association led by a local farmer named Ho Khanh.

The Central Sector of the Imperial Citadel of Thang Long -- Hanoi, located in the heart of the capital of Viet Nam, is the most important and best-preserved part of the ancient Imperial Citadel of Thang Long.

The Central Sector of the Imperial Citadel of Thang Long was built in the 11th century by the Vietnamese Ly Dynasty, marking the independence of the Đại Việt. It was built on the remains of a Chinese fortress dating from the 7th century, on drained land reclaimed from the Red River Delta in Hanoi. It was the centre of regional political power for almost thirteen centuries without interruption.

The central sector of the imperial citadel was listed in UNESCO's World Heritage Site on July 31, 2010 at its session in Brazil, as "The Central Sector of the Imperial Citadel of Thăng Long – Hanoi"

From the 4th to the 14th century AD, the valley at Mỹ Sơn was a site of religious ceremony for kings of the ruling dynasties of Champa, as well as a burial place for Cham royalty and national heroes. It was closely associated with the nearby Cham cities of Indrapura (Đồng Dương) and Simhapura (Trà Kiệu). At one time, the site encompassed over 70 temples as well as numerous stele bearing historically important inscriptions in Sanskrit and Cham.

Mỹ Sơn is perhaps the longest inhabited archaeological site in Indochina, but a large majority of its architecture was destroyed by US bombing during a single week of the Vietnam War.The Mỹ Sơn temple complex is regarded one of the foremost Hindu temple complexes in Southeast Asia and is the foremost heritage site of this nature in Vietnam. It is often compared with other historical temple complexes in Southeast Asia, such as Borobudur of Java in Indonesia, Angkor Wat of Cambodia, Bagan of Myanmar and Ayutthaya of Thailand.

The tower temples were constructed over ten centuries of continuous development in what was the heart of the ancestral homeland of the ruling Dua Clan which unified the Cham clans and established the kingdom of Champapura (Sanskrit for City of the Cham people) in 192 CE.

The monuments of the My Son sanctuary are the most important constructions of the My Son civilization. The tower temples have a variety of architectural designs symbolizing the greatness and purity of Mount Meru, the mythical sacred mountain home of Hindu gods at the center of the universe, now symbolically reproduced on Earth in the mountainous homeland of the Cham people.

In 1999 the old town was declared a World Heritage Site by UNESCO as a well-preserved example of a Southeast Asian trading port of the 15th to 19th centuries, with buildings that display a blend of local and foreign influences.

Hoi An comprises 30 ha and it has a buffer zone of 280 ha. The town reflects a fusion of indigenous and foreign cultures (principally Chinese and Japanese with later European influences) that combined to produce this unique survival.

The town comprises a well-preserved complex of 1,107 timber frame buildings, with brick or wooden walls, which include architectural monuments, commercial and domestic vernacular structures, notably an open market and a ferry quay, and religious buildings such as pagodas and family cult houses.

Hoi An is an outstanding material manifestation of the fusion of cultures over time in an international commercial port.