Lap An Lagoon, also known as An Cu Lagoon, is located right next to National Route 1A, running through Lang Co town. This prime location sits at the intersection of two major tourist cities, Hue and Da Nang, making it very easy for visitors to travel. The lagoon is flanked on one side by the majestic Bach Ma mountain range and on the other by Lang Co Bay with its smooth white sand beaches.

According to local legend, the lagoon was originally named Dam Lang Co (Stork Village Lagoon) because it was once home to numerous flocks of storks. Later, the French mispronounced it as "Lang Co." Finally, after the Vietnam War, the lagoon was renamed Lap An. In addition, in the Dai Nam Nhat Thong Chi (Gazetteer of Dai Nam) of the Nguyen Dynasty, the lagoon was also called Dam Sam (Horseshoe Crab Lagoon) due to the abundance of horseshoe crabs living here.



