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.

The Central Coast Nature Museum has launched the art photography contest “Dance of the Lagoon Birds”. Entries will be accepted from August 18th to October 31st, 2025, from all Vietnamese citizens, capturing vivid and unique moments of bird species living or migrating in lagoons and coastal areas.

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.

On the occasion of the long holiday from April 30th to May 1st, not only historical sites and tourist attractions in Hue City, but also most tourist destinations in Thua Thien Hue province also attracted a large number of visitors to experience, especially waterfalls, beaches, and lagoons.

Being 10km away to the Southeast of Hue City Center, Quang Loi Lagoon is one of the lagoons belonging to Tam Giang lagoon system (the biggest brackish water lagoon in Southeast Asia).

With a diverse ecosystem of mountains, rivers, hills, lagoons and coastal sand dunes, Hue is an attractive destination for tourists in all four seasons of the year.

In response to the changing tourist demands, travel companies and community destinations in Hue have created a variety of experiences for tourists, as well as concentrating on ensuring safety at tourist destinations of streams, waterfalls, seas and lagoons.