The Tam Giang - Cau Hai lagoon system of Hue City stretches in the Northwest - Southeast direction along the coast, with a length of 68 km and a total surface area of 216 km². It comprises three interconnected lagoons: Tam Giang, Thuy Tu, and Cau Hai. With aquatic flora and fauna considered among the richest in Southeast Asia, this ecosystem has sustained generations of local residents.

Noticeable was the opening of the oil painting exhibition by Hoang Nhu Thuy An at Lieu Quan Buddhist Cultural Center. Hoang Nhu Thuy An is Hoang Nhu Bua’s pseudonym, born in 1948, originally from Cau Hai (Cao Do) in Phu Loc, Hue, but currently living in Da Lat. The special thing is that all those paintings were painted after his stroke culminating in hemiplegia. He has learnt to paint with his left hand since then.

Spanning a total water surface area of more than 210 km², Tam Giang - Cau Hai lagoon system,consisting of three main lagoons: Tam Giang, Thuy Tu, and Cau Hai, is often praised as a natural masterpiece bestowed upon Hue. The Tam Giang - Cau Hai lagoon system connects to the East Sea via the Thuan An inlet (Tam Giang lagoon) and the Tu Hien inlet (Cau Hai lagoon). It is the largest brackish lagoon system in Vietnam as well as all of Southeast Asia with an incredibly rich and diverse ecosystem.

In the radiant dawn of the lagoon region, travelers from afar sip rich, flavorful coffee while enjoying the vast, beautiful scenery of rippling waters. This fresh experience has been developed into a tourist attraction, creating a unique highlight for visitors to Tam Giang – Cau Hai Lagoon.

Within the framework of the implementation of the national-level independent project on “Studying and evaluating the current status of the avifauna, and proposing solutions for management and conservation of bird species in coastal lagoon area in Central Vietnam”, which is presided over by the Central Coast Natural History Museum, the Provincial Department of Science and Technology, and implemented by Dr. Ho Thang, the project leader, the research team has recorded the glossy ibis (Plegadis falcinellus) for the first time in the O Lau estuary of Tam Giang - Cau Hai lagoon.

Tam Giang - Cau Hai lagoon system is a world-class brackish water area. It is the largest in Southeast Asia, with special value in biological resources and countless gripping things in history and culture.... This area is seen as a "precious biological gem" that nature has bestowed on the ancient capital. With what existent, is it necessary to build an exhibition space or a museum for the Tam Giang - Cau Hai lagoon system?

Not only famous for its important and beautiful lagoon system in Vietnam, Tam Giang - Cau Hai also holds great potential for tourism development.

In the current conditions of the Tam Giang - Cau Hai lagoon, folk culture is an important resource to transform into unique and identifiable tourism products, with the following elements: village landscape, production culture and beliefs, festivals associated with folk performing arts.

On the morning of October 12, the Provincial Union of Literature and Arts Associations organized a workshop themed "Promoting the values of folk culture in the Tam Giang - Cau Hai lagoon area in tourism development".

Anyone who has ever been attached will tenderly love “the shallow sea” - the largest mangrove area in Southeast Asia. They try to preserve and promote the value of Tam Giang - Cau Hai lagoon... with all their love and enthusiasm. Many other residents are also joining hands to protect their livelihood and that of future descendants.