Top 10 Castles in South Korea
Korea's fortification tradition is ancient and distinctive, shaped by the peninsula's position between China, Japan, and the Manchurian steppes. The primary defensive concern was not feudal rivalry between local lords but the repeated threat of large-scale invasion from outside: Mongols in the 13th century, the Japanese Hideyoshi invasions of the 1590s, and the Manchu invasions of the 1620s-30s. The fortifications that resulted — mountain fortress sanctuaries, royal palace compounds, and coastal defences — are among the most significant in East Asia. Find them on the map.
1. Hwaseong Fortress, Suwon
Hwaseong, built from 1794-96 by King Jeongjo of the Joseon dynasty, is a UNESCO World Heritage Site (1997) and the finest surviving example of late Joseon military architecture. The fortress encircles the city of Suwon in a 5.7-kilometre wall incorporating 48 military structures — bastions, command posts, watchtowers, sluice gates, and gates. Its designer, Jeong Yakyong, synthesised Korean, Chinese, and European military ideas available in Korean scholarship of the period. The full circuit walk takes approximately 2 hours.
2. Gyeongbokgung Palace, Seoul
Gyeongbokgung — the Palace of Shining Happiness — was the principal palace of the Joseon dynasty, built from 1395 when Seoul (Hanyang) became the capital. The palace was burned twice — during the Japanese Hideyoshi invasions and again during the Japanese colonial period — and the current buildings are primarily 20th-century reconstructions on original foundations. The combination of the ceremonial Throne Hall (Geunjeongjeon), the private royal quarters, and the extensive gardens makes it the most complete representation of Joseon palace architecture available.
3. Changdeokgung Palace, Seoul
Changdeokgung, the second of Seoul's Five Grand Palaces, was built in 1405 and served as the primary royal residence for much of the later Joseon period. UNESCO listed it in 1997. The Biwon (Secret Garden) — 78 acres of landscaped grounds including ponds, pavilions, and ancient trees — is accessible by guided tour and is one of the finest traditional Korean garden landscapes.
4. Namhansanseong (South Han Mountain Fortress)
Namhansanseong, a mountain fortress southeast of Seoul, served as a refuge for Korean kings during the Manchu invasion of 1636. The Joseon king Injo was besieged here for 47 days before surrendering. The fortress walls, extending 9 kilometres over the mountain ridge, were originally built in the 7th century by the Unified Silla kingdom and repeatedly rebuilt. UNESCO listed it in 2014.
5. Bukhansan Fortress, Seoul
Bukhansan (North Han Mountain) fortress, within the Seoul metropolitan area, is a mountain fortress built to protect the northern approach to the capital. The 12.7-kilometre wall circuit, incorporating the rocky peaks of the Bukhansan massif, is accessible as a hiking trail from central Seoul. The combination of dramatic mountain scenery and historical fortification makes it one of the most visited heritage landscapes in Korea.
6. Gongsanseong Fortress, Gongju
Gongsanseong, above the Geum river in Gongju, was the mountain fortress of the Baekje kingdom from 475 to 538 AD. The current walls are primarily rebuilt from the later Joseon period on earlier foundations; the site's importance as a Baekje capital is represented in the adjacent archaeological museum. UNESCO listed the Baekje historic areas in 2015.
7. Busanjin Fortress, Busan
Busanjin, above the port of Busan, was one of the first positions to fall to the Japanese Hideyoshi invasion in 1592. The commander Jeong Bal and his entire garrison died defending it. The fortress has been partially reconstructed; its symbolic importance in Korean military history is considerable.
8. Tongyeong Turtle Fortress (Stathagun, South Sea)
The coastal fortresses of the southern coast, associated with Admiral Yi Sun-sin's victories against the Japanese fleet in the 1590s, include several well-preserved examples near Tongyeong. The turtle ship (geobukseon) — Yi's innovative iron- plated warship — is the defining symbol of Korean resistance to Japanese invasion; replicas are displayed at several coastal fort sites.
9. Jinju Castle, South Gyeongsang
Jinju Castle, above the Nam river in Jinju, was the site of one of the most celebrated Korean heroic narratives: the Battle of Jinju (1592), where a Korean force of 3,800 held against 30,000 Japanese soldiers, and the subsequent massacre (1593) where the surviving defenders and civilian population were killed. The fortress and the Uiam Cliff, from which Nongae — a gisaeng who drowned herself along with a Japanese commander — jumped into the river, are the primary memorial sites.
10. Haeinsa Temple Fortress Complex, South Gyeongsang
Haeinsa temple complex in the Gayasan mountains, housing the Tripitaka Koreana — the most complete collection of Buddhist scriptures in the world, carved onto 81,258 woodblocks — is a fortified monastery complex of considerable military as well as religious significance. The woodblocks were produced during the Mongol invasions of the 13th century as a religious act of resistance; the site's defensive walls and the Janggyeong Panjeon storage halls are UNESCO World Heritage-listed.
Explore on the map
Korea's fortress and palace landscape, concentrated around Seoul but extending throughout the peninsula, is on the interactive map.