Munnae-myon, located thirty kilometers to the southwest of Haenam-eup, is better known by the name of Usuyong. During the Choson dynasty, Usuyong was established here because it was the location of one of the three great naval victories achieved by Admiral Sunshin Yi during the Japanese invasion of 1592. This sea battle was called the battle of Uldolmok.
The Usuyong tourist resort has also been established here. It consists of The Monument of Great Victory at Myongryang, the Usuyong castle site (Provincial Monument No. 139), and the Myongrang Victory Park. The area is rich in historic remains.
The Usuyong tourist resort was designated a national tourist resort in 1986 with the purpose of commemorating the Great Victory at Myongryang achieved by Chungmugong in 1597 and also with the intention of restoring and preserving the appearance of the old castle site as a national education center. The first project was the construction of the Myongrang park in 1986 on a site which overlooks Uldolmok.
The Usuyong is one of navy bases King Sejong established in the beginning of the Choson dynasty in preparation for the invasion of foreign enemies. In addition to this base, there were also Kyongsang Usuyong in Pusan, Kyongsang Usuyong in Chungmu, Cholla Usuyong in Yosu, and Cholla Usuyong in Haenam.

Situation : Hakdong-ri, Munnae-myeon, Haenam-Gun, Jeonnam
History
   The third place made a sweeping victory at the Japanese Invasion (1597. 9.16).
   Monument for sweeping victory of Myeongryang in built in 1688 the 14th years of SukJong,
   Joseon. 
   1969. Designated as a Treasure No. 503-Monument for a Sweeping victory at Myeongryang
   1986. Designated as Usuyeong National Tourist Resort
   1990. Comopsed of a Memorial Park for the Myeongryang's Victory

Tower for a sweeping victory at Myeongryang
Gemeral Yi Sun-Sin and the soldiers under his command with the loyalsoldiers had crushed the Japanese ships of 133 with only 12 using the geography and the tides of Uldolmok at sep 16th in1597. This tower shows unique victory in the world.

Myeongryang channel is located between Usuyeong Haenam, Nokjin Jindo-Gun. It's narrowest, width is 325m, depth is 20m and the speed of tide is 11.5 Knot per hour appears two times in a day and quiescence two times.

It is a monument recorded if the words by Song Hwi-Rib under Chung-mugong's command and by Kim Geuk-Hui, Busa of Geoje.

It's shape is a representation of that times state about the resolution for their country. They are the five generals including General Yi Sun-Sin and Kim Oeok-Chu arriving at Hoeryeong-po in Jangheung with regarding with regarding Myeongryang a final battleground.

It's image says a feat of O Geuk-sin and O Gye-Jeok, father and son, come from Haenam died at war.