It is the ruins of the capital city of the ancient Ryukyu Kingdom, located in the south of Okinawa, about 9 kilometers from Naba Airport, and takes 30 minutes to drive. Seoul City is a Ryukyu-style Castle located in the southern part of Okinawa, east of Naha City, Ryukyu Islands. It was built from the end of the 13th century to the beginning of the 14th century. From the 15th to 19th centuries, it was the capital and palace of the Ryukyu Kingdom. Seoul was the political and power center of the Ryukyu Kingdom. Seoul City is an important historic site of the Ryukyu Islands. It is a Tang Dynasty style building replicated by the prototype that remained after the war. Seoul is the palace building of the Ryukyu Kingdom. It was the place where the King handled state affairs, received envoys and held important celebrations. It combines the architectural features of China, Japan and Okinawa. Today's castles include the North Palace, the South Palace, the Seoul Gate and many gates. Seoul was destroyed four times, and was last rebuilt in 1992. The main hall of the most striking building in Seoul was originally the place where the Ryukyu King conducted official business and held important ceremonies. Seoul City, once known as the political, diplomatic and cultural center of He Ryukyu Kingdom, integrates the unique architectural style of Chinese and Japanese city building culture, as well as the superb stone masonry technology, and has a very high cultural and historical value. In December 2000, Seoul City was recognized as the 11th World Cultural Heritage Site of Japan. Seoul City is the core scenic spot of Seoul City Park. Entry tickets are required for visitors. It's worth seeing.