If you have searched for a free observation deck in Seoul and come away with nothing but ticket prices for N Seoul Tower and Lotte World Tower, there is now a much better answer, and it is sitting in the middle of the city where most visitors already walk past it. Seoul City Hall has quietly turned itself into a cluster of three free viewing spots — the Sky Observatory (하늘전망대) on floors 8 and 9, the Jeongdong Observatory (정동전망대) on the 13th floor of the Seosomun building, and the Haneul-tteul rooftop garden (하늘뜰) on top of the Seoul Metropolitan Library. No ticket, no reservation, and from September 2026 two of them stay open on Friday and Saturday nights.

The headline view is the one people come for: looking straight down onto Deoksugung Palace and the Anglican Cathedral, with Gwanghwamun and Sungnyemun in the distance, through floor-to-ceiling glass. This guide covers what each of the three spots actually is, the exact opening hours, how to find the elevator, the new night-time tour, and how the whole thing compares to the paid observation decks you were probably about to book.

A quick word on the City Hall area

Seoul City Hall sits in Jung-gu, the historic centre of the city, at Sicheong Station (City Hall Station) on subway lines 1 and 2. It is the square with the wavy glass building looming over a small grey-stone colonial-era one — the old 1926 city hall, now the Seoul Metropolitan Library, with the 2012 glass wave built behind and over it.

What makes the location unusually good for a viewpoint is what surrounds it. Deoksugung Palace is directly across the road. Jeongdong, the old foreign legation quarter, runs west behind the palace wall and is full of late-19th-century churches, schools and embassies. Gwanghwamun Square and Gyeongbokgung are ten minutes north, Sungnyemun (Namdaemun Gate) is ten minutes south, and Myeongdong is a fifteen-minute walk east. You are standing in the middle of almost everything a first-time visitor has on their list, which is exactly why a free eighth-floor window here is worth more than it sounds.

The three free viewpoints at a glance

All three are free and none of them requires a reservation. If you only have time for one, make it the Sky Observatory.

What is the Sky Observatory (하늘전망대)?

The Sky Observatory opened to the public on 6 July 2026. It is a roughly 122 m² viewing space built into the west side of the main Seoul City Hall building, across floors 8 and 9, with stairs connecting the two levels. The ninth floor is the main deck; the eighth is a smaller lounge that is usually quieter.

It was an immediate hit. In its first eight weeks, to 30 August 2026, roughly 66,000 people came through — enough that the city extended the hours rather than leaving it as a weekday-office-hours curiosity.

The thing that makes it genuinely different from Seoul’s paid decks is the altitude. At eight or nine floors you are not looking at a hazy grey sprawl from 500 metres up; you are looking down into Deoksugung’s courtyards and tiled roofs from close enough to make out the layout of the palace. The Anglican Cathedral’s red brick sits right beside it, and on a clear day the view carries north to Gwanghwamun and south to Sungnyemun. It is a city-scale view rather than a landscape-scale one, which is a much better match for what most visitors actually want to photograph.

One detail that matters if you do not read Korean: the city installed view-identification panels on the floor labelling the major buildings in both Korean and English, so you can work out what you are looking at without an app.

Location & how to get there

Getting to City Hall Station is about as easy as Seoul transport gets — it is an interchange on two of the busiest lines. If you are still working out cards and transfers, our step-by-step Seoul subway guide and the broader Seoul public transport guide cover it.

The new Friday & Saturday night opening

This is the part worth planning around. Until early September 2026 the Sky Observatory was a weekday-only, daytime-only space, which made it almost useless for anyone on a short trip. From 4 September 2026, the city added Friday and Saturday night opening.

The night view is the reason to go late. Seoul lights the facades of both City Hall and the Seoul Metropolitan Library until 23:00 every day, and from the deck you get Sejong-daero running north with Gwanghwamun lit at the end of it. Deoksugung itself is far more atmospheric after dark than at midday.

Worth knowing: the city has described this as a trial. Seoul has said it will review this year’s results and visitor response, and is considering extending night opening to six days a week from next year. So if the Friday/Saturday limit does not suit your trip, it may be worth checking again closer to the time.

Jeongdong Observatory (정동전망대)

Five minutes’ walk away, on the 13th floor of Seosomun Building No. 1, the Jeongdong Observatory is the older and higher of the two indoor decks, and it has a different angle: it looks northeast over Seoul Plaza and City Hall, then sweeps across Deoksugung and northwest into the Jeongdong quarter. If the Sky Observatory gives you the palace from above, Jeongdong gives you the palace in its neighbourhood — the wall, the stone path, the old legation buildings behind it.

It also picked up Friday and Saturday night opening from 4 September 2026, on the same schedule: until 22:00 in summer, until 21:00 in winter.

Its daytime hours are the awkward part and the thing most people get wrong: from Monday to Thursday it does not open until 13:30, so turning up at 11:00 on a Tuesday is the classic mistake. Friday and Saturday are the days to aim for. Entry is free.

That Saturday schedule is worth noting, because it makes Jeongdong the one to use on a Saturday — the only one of the three open continuously from morning through to 22:00, on the day the Sky Observatory is shut until evening.

Haneul-tteul rooftop garden (하늘뜰)

The third one is outdoors and the most overlooked. Haneul-tteul is the roof garden on the 5th floor of the Seoul Metropolitan Library — the old 1926 building on the square. From September 2026 the city fully opened both sides of it: the Sejong-daero side, which it had already been showing, and now the Seoul Plaza side as well.

Because it is a genuine outdoor terrace rather than a window, it is the best of the three for photos without glass reflections, and it puts you at eye level with the glass wave of the new City Hall right behind you — an odd and very photogenic contrast of 1926 and 2012.

Note the Monday closure — it follows the library’s schedule, not City Hall’s. And note that it shuts entirely from December through February, so a winter visitor gets the two indoor decks only.

The guided night tour (통통투어)

If you want context rather than just a window, Seoul added a night course to its City Hall building tour, the Tongtong Tour, running every Friday and Saturday from 18 September 2026. It starts at 19:30 and runs about an hour, led by a guide, taking you through the building and finishing with the night views from both the Sky Observatory and Haneul-tteul.

Online reservations open on 15 September 2026. The tour has historically been run in Korean, so check the language before booking if that matters to you — the observatories themselves need no booking and no Korean at all, so the tour is a nice-to-have rather than the main event.

How this compares to Seoul’s paid observation decks

To be clear about what you are and are not getting: this is not a substitute for Seoul Sky at Lotte World Tower. Seoul Sky is 500 m up with a glass floor and a genuinely vertiginous panorama of the whole metropolitan area, and it costs accordingly. N Seoul Tower gives you the mountain-top ring of the city.

What City Hall gives you is different and, for a lot of people, more useful: a close, detailed, historic-centre view that costs nothing and takes fifteen minutes. You can do it on the way to Deoksugung, in the rain, on a day you have already spent your budget. The honest recommendation is to do one paid deck for the wow shot and use City Hall as the free one you can drop into whenever you are in the centre — much the same way we treat the Starfield Library at COEX.

Making a half-day of it

The three viewpoints sit within a few minutes of each other, and the area around them fills a morning or an afternoon comfortably:

• Deoksugung Palace — directly across from City Hall, small, walkable, and the one palace with a Western-style stone hall in it. Modest entry fee.
• The Deoksugung stone wall path (덕수궁 돌담길) — the walk west along the palace wall into Jeongdong, free and lovely in autumn.
• Jeongdong — the old legation quarter: Chungdong First Methodist Church, the Anglican Cathedral, Jeongdong Theater.
• Seoul Plaza — the lawn out front, which the city programmes with events and, in winter, an ice rink.
• Myeongdong — fifteen minutes east on foot if you want to finish with street food.

For a night plan: Jeongdong Observatory or Haneul-tteul before sunset, dinner nearby, then the Sky Observatory once the facade lighting is on, any Friday or Saturday.

Quick facts

• All three viewpoints are free. No ticket, no reservation, no ID required.
• Sky Observatory: City Hall main building, west side, floors 8–9. Mon–Fri 07:30–18:00, plus Fri & Sat nights to 22:00 (21:00 in winter, Nov–Feb).
• Jeongdong Observatory: Seosomun Building No. 1, 13F (15 Deoksugung-gil). Mon–Thu 13:30–17:30, Fri 13:30–22:00, Sat 09:00–22:00; no Sunday hours listed. Closes 21:00 in winter. Closed public holidays.
• Haneul-tteul roof garden: Seoul Metropolitan Library 5F. March–November, weekdays 09:00–21:00, weekends 09:00–18:00, closed Mondays.
• Nearest station: City Hall Station (시청역), Lines 1 & 2, Exit 5.
• Facade lighting on City Hall and the library runs until 23:00 daily.
• Good for: rainy days, tight budgets, a Deoksugung photo you cannot get from the ground, travellers with small children who will not sit through a paid deck.
• Not good for: a wide panoramic city view — that is what the paid towers are for.

Frequently asked questions

Is the Seoul City Hall Sky Observatory really free?
Yes. All three City Hall viewpoints — the Sky Observatory, the Jeongdong Observatory and the Haneul-tteul roof garden — are free, with no ticket and no advance reservation.

Can tourists go in, or is it only for residents?
Anyone can go in. It is a public building open to the public; you walk in the main entrance and take the observatory elevator. No ID check, no registration.

Is it open on weekends?
Partly, and this is the confusing bit. The Sky Observatory runs Monday to Friday in the daytime plus Friday and Saturday nights, so it is shut during the day on Saturday and all day Sunday. On a Saturday, the Jeongdong Observatory is your best option — it runs 09:00–22:00. On a Sunday, the Haneul-tteul roof garden is the one open (09:00–18:00); Jeongdong has no Sunday hours listed. Haneul-tteul is closed on Mondays.

What can you actually see from the Sky Observatory?
Deoksugung Palace from above, the Seoul Anglican Cathedral, and on a clear day north to Gwanghwamun and south to Sungnyemun. Floor panels label the buildings in Korean and English.

Is it better than Seoul Sky or N Seoul Tower?
Different, not better. Seoul Sky is a 500 m panorama of the whole city; City Hall is a close, detailed view of the historic centre. If you want one big view, pay for Seoul Sky. If you want a good view for free while you are already downtown, come here.

How long does a visit take?
Fifteen to thirty minutes for the Sky Observatory alone. Allow an hour to an hour and a half if you want to see all three viewpoints.

Do the hours change?
Yes, and often — these are new facilities and the night opening is explicitly a trial. Seoul has said it may extend night opening to six days a week next year. Check the Seoul Metropolitan Government website or call the city’s 120 Dasan Call Center before a special trip.

The bottom line

Free viewpoints in central Seoul that are actually worth the walk are rare, and for years the answer to “where can I get a good view of Seoul without paying” was a vague gesture at a mountain. Seoul City Hall has now put three of them within a two-minute radius, one of them looking straight down at a palace, and opened two of them on Friday and Saturday nights. It is fifteen minutes out of a day you are already spending in the centre, it costs nothing, and it is genuinely a better palace photograph than you will get from inside the palace. Go on a clear evening.

Written by WY, a Seoul-based local sharing honest, first-hand guides to Korea. Most guides here are places I have been to and photographed myself; this one is an early heads-up written from official city sources, and I will update it with my own photos after I visit. More about me →