More than half a century since the homeland’s liberation (March 26, 1975 – March 26, 2026), Hue’s urban landscape has undergone significant transformation, marked by newly widened roads, bridges spanning rivers and lagoons, modern urban zones, and an increasingly synchronized technical infrastructure system.

Tam Giang - Cau Hai Lagoon system in Hue City is the largest brackish water ecosystem in Southeast Asia, stretching 68 km, covering a total water surface area of approximately 216 km2. The area is renowned for its poetic sunsets, rich biodiversity, and serves as a popular destination for eco-tourism, photography, and enjoying local seafood specialties.

Within the cultural complex of Hue, if the system of palaces and royal tombs defines the face of an Imperial capital, the villages along the lagoon and coastline preserve the depth of community life. There, heritage does not lie dormant in the past but lives on in every festival season, every daily custom, and every belief tied to the natural environment. The Cau Ngu Festival of Thai Duong village, held once every three years in January at the Thuan An seaport, is precisely such a heritage - a vibrant cultural practice where community memory, maritime knowledge, and the will to survive have woven together into an enduring whole across hundreds of years.

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.

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.

Bridges connecting sea and traversing lagoons are constructed not only to finalize the inter-regional transportation infrastructure system but also to promote the development of coastal cities and satellite towns, fostering socioeconomic growth and improving the quality of life for residents.

Just about 30 kilometers away, Quang Loi Lagoon is not far from the center of Hue City. It's located in Quang Loi Commune, Quang Dien District - a low-lying area rich in cultural identity. Covering approximately 800 hectares, the lagoon is part of the Tam Giang lagoon system. Following the flow of the waters, the lives of the people here are closely tied to the water as they engage in simple and humble fishing activities.

The primeval forest with a system of beautiful streams and waterfalls, the vast lagoon connecting to the ocean, along with many other magnificent landscapes of Phu Loc, have mesmerised sketchers. Standing before such beautiful scenes, the sketcher couldn't help but feel moved to put shimmering, fanciful strokes on the sketches.

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.