Dai Nam sea, Dai Nam Van Hien, Binh Duong province, Vietnam - Dai Nam sea (Biển Đại Nam) is known as the biggest artificial sea in Southeast Asia by 2010 on an area of 21.6 ha and a total water surface area of 2ha and coast of 1.4 km long. The artificial sea has beaches, with artificial waves up to 1.6m high.