Seoul Sky is the observation deck at the top of Lotte World Tower in Jamsil. The tower is Korea’s tallest building at 555 m, and the view floors (117F-123F) sit around 500 m up, among the highest observation decks anywhere in the world. I went on a summer evening, timed for sunset, and that turned out to be the right call. Here’s how to do it well, because timing and a few small decisions change the experience a lot.

What is Seoul Sky?

Seoul Sky occupies the top seven floors of Lotte World Tower, from the 117th to the 123rd. Unlike Namsan Tower, which gives you the classic postcard angle of Seoul from the middle of the city, Seoul Sky puts you far higher and further east, so you get the whole sweep at once: the Han River curling through the apartment blocks, the mountains ringing the city, and on a clear day all the way to Incheon and the sea. When the elevator doors opened I actually said “wow” out loud, and I’m not a wow-out-loud person.

Tickets, and why you should book ahead

Standard admission is 33,000 won for adults (13+) and 29,000 won for children (36 months to 12 years); kids under 36 months are free with proof of age. Entry is timed, and tickets open 14 days ahead online. That matters because capacity per slot is capped, and the sunset slots sell out first. There’s also a Fast Pass (62,000 won, all ages, sold only at the ticket counter on the day) that skips the queue entirely.

Two money-saving notes. Booking platforms like Klook, Trazy and GetYourGuide regularly sell vouchers below the walk-up price; you swap the voucher for a real ticket at the B1 counter. And if you’re also doing Lotte World Aquarium in the same complex, package tickets knock a decent chunk off both.

Getting there

Take Line 2 or Line 8 to Jamsil Station; the station connects underground to the tower and the ticket lobby is on B1. One warning from experience: the underground maze between the station, the department store and the mall is bigger than it looks, so give yourself a spare 15-20 minutes the first time. If you drive, parking is paid and adds up over a long visit, so I’d honestly just take the subway.

The ride up is part of the show

The elevator, officially the “Sky Shuttle,” is a double-decker that climbs at 600 m a minute, which means you’re at the 117th floor in about a minute. The walls and ceiling play a film on the way up, your ears pop like on a plane, and the doors open onto that first full-width view. Even the walk to the elevator is designed: a dark corridor of media art with hanok-roof projections overhead that, from what I saw, foreign visitors photograph more than anything else down there.

What’s on each floor

You arrive on 117 or 118 and work your way up by escalator (note: the escalators only go up; coming back down is stairs or the lift). The floors that matter: 118F has the glass-floor Sky Deck, where you stand on clear panels and look 478 m straight down. I have a real fear of heights and could not step onto it unassisted; a staff member kindly helped me get my one proof-of-courage photo. 120F has the outdoor Sky Terrace, open-air at roughly half a kilometre up, which closes in strong wind or rain. 122F is the café, and 123F is a premium lounge reached only by a separate lift from 121F.

A fun detail for theme-park people: look straight down on the north side and Lotte World Adventure, the amusement park on Seokchon Lake, sits below you like a toy diorama. The Magic Island castle is instantly recognisable.

Time it for sunset

This is the single best piece of advice I can give. Book a slot 60-90 minutes before sunset and you get three views for one ticket: the city in daylight, the sun dropping over the Han, and the lights coming on across Seoul. We grabbed a window table at the 122F café and just sat there for over an hour while the sky did its thing. It’s the highest café in Korea, the drinks are ordinary and slightly pricey, and it’s still completely worth it for that seat.

The trade-off is crowds: sunset (roughly 5-6 pm onwards) is the busiest window, and the elevator queue can hit 30-60 minutes on weekends. If you’d rather have the place quiet, go about 90 minutes before closing instead; you’ll still catch the night view with a fraction of the people. One thing weather-wise: on a hazy fine-dust day the view shrinks dramatically, so check the air quality before you commit. On a truly clear day you can see Songdo and Incheon on the horizon.

The Sky Bridge, if you’re braver than me

Above the observation floors, at 541 m, there’s an open steel bridge across the very top of the tower, and you can walk it on the Sky Bridge Tour (106,000 won if you buy at the 117F desk with an admission ticket, or 130,000 won as a combined ticket at B1). You suit up in harness gear for about an hour on the roof of Korea. I stood and read the whole promotional display on 117F and still decided against it. If you do it, I salute you.

Small things worth knowing

Staff photographers will pose you for pictures on the way in; the framed prints start at 15,000 won upstairs, and it’s fine to just wave them off if you’re not interested. There are souvenir shops both on the upper floors and at the exit, with the same stock, so don’t feel pressed to buy at altitude. And once you exit, there’s no re-entry, so do the terrace, the glass floor and the café before you head down.

Quick facts

• What: Seoul Sky, the observation deck on floors 117-123 of Lotte World Tower (555 m, Korea’s tallest building)
• Where: 300 Olympic-ro, Songpa-gu, Seoul · Jamsil Station (Line 2/8), ticket lobby on B1
• Hours: Sun-Thu 10:30-22:00 (last ticket 21:00) · Fri, Sat & nights before holidays 10:30-23:00 (last ticket 22:00)
• Tickets: adult 33,000 won · child (36 mo-12 yr) 29,000 won · under 36 months free · Fast Pass 62,000 won (on-site only)
• Booking: timed entry, opens 14 days ahead online; voucher sites (Klook, Trazy, etc.) often cheaper; aquarium package deals available
• Sky Bridge Tour: 106,000 won at 117F (with admission) / 130,000 won combined at B1
• Don’t miss: 118F glass-floor Sky Deck · 120F outdoor terrace · 122F café window seats at sunset
• Note: no re-entry after exit · escalators between floors go up only · outdoor terrace closes in bad weather

Frequently asked questions

Is Seoul Sky worth it compared to Namsan Tower?
They’re different products. Namsan gives you the classic mid-city postcard view; Seoul Sky is nearly twice as high and shows you the entire metropolitan sweep, river to mountains. If you only do one and you love big views, I’d pick Seoul Sky; if you want the romantic Seoul-at-your-feet feeling, Namsan.

What’s the best time to visit?
A slot 60-90 minutes before sunset, so you get day, sunset and night in one visit. For fewer crowds, go about 90 minutes before closing.

How long does a visit take?
Ninety minutes is comfortable; add an hour if you settle into the café for sunset like we did.

Do I need to book in advance?
Yes, especially for sunset slots and weekends. Entry is timed and capacity is capped. Tickets open 14 days ahead.

Is it scary if I’m afraid of heights?
The main floors feel completely solid; it’s all thick glass and wide interiors. The 118F glass floor and the outdoor terrace are optional, so you can simply skip them.

Can I eat or drink up there?
Yes, there’s a dessert café on 119F and the main café on 122F, plus a premium lounge on 123F. Window seats at the 122F café are the prize.

If I were planning it again, I’d do exactly the same thing: a weekday slot an hour before sunset, straight up, one lap of the floors, then a window seat on 122 until the city lights come on. If you have one clear evening in Seoul and you’re anywhere near Jamsil, this is a very good way to spend it.

Written by WY, a Seoul-based local sharing honest, first-hand guides to Korea. Every guide starts with a real visit — I went, I paid attention, and I wrote down what I found. More about me →