N Seoul Tower on Namsan

The tower is a broadcasting mast completed in 1971 and opened to the public in 1980, standing on a mountain that is already 270 metres high — which is why the view from the base is most of the view.

The plaza at the foot of the tower, the terraces, the padlock fences and the paths through Namsan park are all free and open around the clock. On a clear evening you can see the river, both banks, Bukhansan to the north and, on the best days, the ridgelines beyond it.

The ₩29,000 buys the observatory: a glassed deck several hundred metres up with distance markers around the windows, a café and a restaurant that charges accordingly. Whether that is worth twenty-one dollars depends entirely on whether you want to be inside a window or outside on a terrace. On a hazy summer evening it is not; on a hard-frozen January night with the city sharp to the horizon, it is.

One renaming to note: the operator changed and the official site now brands it YTN Seoul Tower. Signage, tickets and search results still use N Seoul Tower and Namsan Seoul Tower interchangeably; they are all the same building.

The best hour is the one before sunset and the half hour after it, when the city switches on and the sky still has colour. Everyone knows this, which is why the cable car queue is longest then and the bus is the better plan.

Winter gives the clearest air by a wide margin. From December to February the view genuinely reaches the mountains; in July and August humidity and haze often reduce it to the middle distance, which is a poor use of ₩29,000.

Weekdays are noticeably quieter than weekends, and the last two hours before closing are quieter than the sunset rush. If you want photographs without a crowd, 21:30 on a Tuesday is a different place from 19:00 on a Saturday.

Namsan is a forested park with paved paths, and treating it as a walk rather than as an obstacle changes the evening entirely.

The northern slope above Myeongdong is the standard route up: steady, paved, twenty-five to thirty-five minutes, with benches and a view that opens out about two-thirds of the way. The southern side towards Itaewon is quieter and steeper. Along the ridge run stretches of the Seoul City Wall, and the beacon mound near the summit — a restored signal station — is one of the few genuinely old things on the mountain.

The practical advice is to take the bus up and walk down. You arrive rested, get the view at the top, and the descent at night through lit woods with the city below is the part people remember. The path comes out near Myeongdong, which is where the evening food is anyway.