Fortresses

For one fortress on a Seoul-based trip, go to Hwaseong in Suwon: the 5.74 km UNESCO-listed wall is free, open at all hours and 30–40 minutes from Seoul by train. For a greener, quieter ridge walk choose Namhansanseong (free, UNESCO 2014); with only two hours in Seoul, walk the Naksan section of the Seoul City Wall. Palaces inside fortresses charge separately, and Namhansanseong’s palace closes on Mondays.

Korea is full of fortresses: its kingdoms fought over the peninsula for some two thousand years. Three kinds are worth knowing: sanseong (mountain fortresses, such as Namhansanseong), eupseong (walled county towns on flat ground, such as Naganeupseong), and the capital walls of Seoul and Suwon. Many were rebuilt or extended after the Japanese invasions of the 1590s, the Imjin War.

Which fortress fits your trip

Your situation	Do this
One day out of Seoul, first trip	Hwaseong in Suwon: walk the wall, see the Haenggung palace, eat galbi or fried chicken
You want a forest walk, not a town	Namhansanseong: Line 8 to Sanseong Station, bus 9 or 52, then a 1–3 h wall course
Two or three hours in Seoul	Seoul City Wall, Naksan section (3.2 km, about 1 h 30 min, free, good at dusk)
You are hiking Bukhansan anyway	Take the western route through the Bukhansanseong gates — see Bukhansan
On the way to Jeonju, Gwangju or Busan	Gongju and Buyeo (Baekje walls), Naganeupseong near Suncheon or Jinjuseong in Jinju

If you see only one, make it Hwaseong: it is the most complete, the easiest to reach, and its walls still ring a lively city centre. Namhansanseong is the one to add if you liked it.

Fees and hours near Seoul in 2026

Fortress	Wall	Fee	Open	Getting there
Hwaseong, Suwon	5.74 km loop	Wall free; Haenggung palace ₩2,000	Wall at all hours; palace daily 09:00–18:00	Train to Suwon Station (30–40 min), then city bus
Namhansanseong, Gwangju-si	About 12 km on a ridge	Fortress free; Haenggung ₩2,000 (youth ₩1,000)	Haenggung 10:00–18:00 Apr–Oct, 10:00–17:00 Nov–Mar; closed Mondays	Line 8 Sanseong Station, bus 9 or 52 to the Namhansanseong terminus
Seoul City Wall	18.6 km in 4 sections	Free	Bugaksan section open 24 h; the official site suggests daylight hours (to 17:00 in winter)	Hyehwa (Line 4), Dongdaemun (Lines 1 and 4) or Changuimun gate
Ganghwa forts, Incheon	Coastal forts	Chojijin and Deokjinjin free; Gwangseongbo ₩1,500	Deokjinjin 09:00–18:00	Bus to Ganghwa — see Incheon

Fees for adults, from the Suwon Cultural Foundation, the Gyeonggi Namhansanseong World Heritage Center, Seoul’s city-wall site and Ganghwa County, checked 25 October 2026. Namhansanseong’s palace is free for anyone wearing hanbok, and for visitors 65 and over. The walls themselves cost nothing at all three sites near Seoul, so you only pay for palaces and museums.

Hwaseong Fortress, Suwon

King Jeongjo built Hwaseong in the 1790s around a new town that was meant to become a second capital. Its walls, gates, watchtowers and water gate survive almost complete, and it was inscribed by UNESCO in 1997. Climb Paldalsan to Seojangdae for the view, then follow the wall north to the Hwahongmun water gate and Banghwasuryujeong pavilion, best at dusk. At Yeonmudae you can shoot traditional arrows or ride the Hwaseong Trolley.

The Suwon guide covers trains, buses, the palace’s night openings and where to stay, and day trips from Seoul has the one-day plan.

Namhansanseong

Namhansanseong sits about 25 km south-east of central Seoul, on mountains averaging over 480 m, with about 12 km of wall around a basin wide enough for a village. Built on a Silla-era site and greatly extended under King Injo in 1626, it was the royal refuge in wartime, and the court sheltered here during the Qing invasion of 1636–37. The fortress was inscribed by UNESCO in 2014 and has been free to enter since 2007. Inside, the rebuilt Haenggung was the king’s retreat palace.

The heritage centre publishes five wall courses, most starting at the Rotary in the village:

• Course 2, 3 km, about 1 h: the shortest, past the Sueojangdae command post and the West Gate.
• Course 1 or 4, 3.8 km, about 1 h 20 min: half the circuit, via the North and West gates or the South and East gates.
• Course 5, 7.7 km, about 3 h 20 min: the whole circuit.

From Jamsil, Line 8 reaches Sanseong Station in about 19 minutes; buses 9 and 52 then climb to the Namhansanseong terminus. The heritage centre advises public transport on public holidays, when the road up and the car parks are very crowded.

Seoul City Wall (Hanyangdoseong)

The wall of Joseon Seoul was begun in 1396 along the four inner hills, Bugaksan, Naksan, Namsan and Inwangsan. About 70 percent of its 18.6 km survives or has been rebuilt, and a marked path follows it all the way round.

Section	From → to	Length	Time
Baegak (Bugaksan)	Changuimun → Hyehwamun	4.7 km	About 3 h
Naksan	Hyehwamun → Gwanghuimun (via Dongdaemun)	3.2 km	About 1 h 30 min
Namsan	Gwanghuimun → Donuimun site	6.7 km	About 3 h 30 min
Inwangsan	Donuimun site → Changuimun	4 km	About 2 h 30 min

Official course lengths and walking times from the Seoul City Wall site, checked 25 October 2026. Naksan is the easy, low section; Baegak and Inwangsan are real hill climbs with long stairs. The free Hanyangdoseong Museum near Dongdaemun (09:00–18:00, closed Mondays and 1 January) explains the wall before you walk it, and the Namsan section climbs past N Seoul Tower.

Fortresses beyond Seoul

• Gongju and Buyeo (Chungcheong). The walls of the Baekje kingdom’s last two capitals. Gongsanseong in Gongju (₩3,000; 09:00–18:00 Mar–Oct, to 17:00 Nov–Feb) follows a hill above the Geumgang River; a ₩6,000 combined ticket adds the Muryeong royal tomb and the Seokjang-ri Museum. Busosanseong in Buyeo (₩2,000, free from 12:00 to 13:00) is a wooded hill with paths to the Nakhwaam cliff. Both belong to the UNESCO Baekje Historic Areas. Buses from Seoul take about 1 h 30 min to Gongju and about 2 h to Buyeo.
• Haemieupseong (Seosan, Chungcheong). A walled garrison town about 1.8 km round, free, open 05:00–21:00 from March to October and 06:00–19:00 from November to February.
• Naganeupseong (Suncheon, Jeolla). The most lived-in of the walled towns: about 230 residents in some 290 thatched houses inside a 1.41 km wall. ₩4,000; tickets are sold until 17:30 to 18:30 depending on the month.
• Gochang Eupseong (Gochang, Jeolla). A town wall on a pine slope, ₩3,000. At the Moyangseong festival each October (15–19 October in 2026) people walk the ramparts carrying a stone on their head.
• Jinjuseong (Jinju, Gyeongsang). The fortress where a Joseon garrison beat back a Japanese siege in 1592 and fell to a second in 1593. ₩2,000 from 09:00 to 18:00; the grounds stay open 05:00–23:00 from March to October and to 22:00 in winter. The Jinju National Museum inside is closed on Mondays. Each October the Namgang Yudeung festival floats lanterns on the river below (3–18 October in 2026).
• Smaller stops on city trips. Jeonju’s Pungnammun is the last gate of its city wall, next to the Hanok Village. Yeosu’s Jinnamgwan is the vast hall of the Joseon navy’s headquarters. On Ganghwa Island, Jeondeungsa temple stands inside an old mountain fortress.

For temples inside fortress walls, see temples; for every listed site, see World Heritage sites; for the palaces of Seoul, see palaces. Mountain fortresses make good half-day hikes, and the hiking guide covers the trails around Seoul.

Practical tips

• Shoes and daylight. Ramparts are uneven stone with steep steps. On Bugaksan, Inwangsan and Namhansanseong, start at least three hours before sunset.
• Mondays. Fortress walls are open every day, but many palaces and museums inside them close on Mondays, including Namhansanseong’s Haenggung, the Hanyangdoseong Museum and the Jinju National Museum.
• Hanbok helps. Wearing hanbok gets you into Namhansanseong’s palace free, as at Seoul’s palaces.
• Autumn is the season. Mid-October to early November brings red maples along the walls of Suwon and Namhansanseong and the big fortress festivals; see the autumn leaves report.