Quan ho folk songs are always performed voluntarily in groups of male (bon nam) or female (bon nu). Each group usually has four to six people who are named by order such as “Second Sister”, “Third Sister”, “Fourth Sister”, or “Second Brother”, “Third Brother”, “Fourth Brother” and so on

In 1009, Ly Cong Uan was enthroned, founded Ly Dynasty. In July, 1010, the king promulgated Chieu Doi Do (the royal decree) to change the capital city from Hoa Lu (Ninh Binh) to Dai La Citadel. After transferring the capital city, Ly Cong Uan had Citadel of Thang Long built and the citadel construction was finished in early 1011

The citadel of the Ho Dynasty is considered as the only stone citadel remaining in Southeast Asia and is one of the few remains in the world.

The festival vividly imitates the evolution of fights of Saint Giong and Van Lang people under the 6th King Hung reign in combating against the foreign enemies

Xoan singing has existed for more than 2,000 years since Hung Kings dynasty

According to legend, Lac Long Quan – son of Kinh Duong Vuong Loc Tuc got married with Au Co – daughter of King De Lai and gave birth to 100 sons. After that, 50 sons followed Au Co and 50 others followed Lac Long Quan to settle. The first son followed his mother to arrived in Phong Chau Land (now Phu Tho Province) and established Van Lang Nation and became King Hung

The woodblocks at Vinh Nghiem Pagoda show the formation, development and ideology of Truc Lam Zen Buddhism, at the same time also mark the development of Nom writing system through the periods.

The Woodblocks of Nguyen Dynasty were created primarily during the past activities of the Historiographer's Office of Nguyen Dynasty (established in 1820 under the Minh Mang reign) in Hue

All the 82 steles are of the same model: the slab is flat with an arched pediment and tortoise-shaped base; the tortoise is rather big and looks strong; the steles are of different sizes

Located on an altitude of 1,000m-1,600m, belonging to 4 districts of Quan Ba, Yen Minh, Meo Vac, Dong Van (Ha Giang Province), the 2,356km² - Dong Van Karst Plateau is one of Viet Nam's special limestone areas, housing prominent imprints that depict the development of the earth’s crust. Up to 80% of the karst formations of Dong Van Plateau are limestone formed by environment conditions and different development stages of nature.