Naksan Park city wall: which station should you start from?

Which end of the Naksan wall is the easier climb?
Start from Hansung Univ. Station and you do less climbing. Seoul's official city wall guide puts Exit 4 of Hansung Univ. Station (Line 4) three minutes' walk from the Naksan entrance. Come up from Dongdaemun Station on Line 1 instead and you climb alongside the wall the whole way. It is the same path either way, but the direction you enter from decides how much of it is uphill.
How steep is Naksan?
Naksan is 124 metres, the lowest of Seoul's four inner mountains. The official wall guide describes it as gentle enough for a stroll and rates the section two stars for difficulty. You do not need hiking boots, but there are stair sections along the wall, so leave the flip-flops behind.
How long does the whole section take?
The Naksan section runs 3.2 km from Hyehwamun to Gwanghuimun and takes about an hour and a half on foot. That figure assumes you keep walking. Stop for photographs or sit down for a while and it stretches closer to two hours. You do not have to walk all of it — reaching the top of Naksan Park alone still gives you the wall and the city spread out below it.
What is different if you start at Hansung Univ. Station?
You begin at Hyehwamun and walk with the wall on your left. From Exit 4 it is three minutes to the Naksan entrance, so the climb starts almost immediately — but getting the height out of the way early makes the rest gentle. Hyehwa Station Exit 2 also works; the official guide puts it 20 minutes' walk from Naksan Park, so Hansung Univ. is the shorter approach.
What is different if you start at Dongdaemun?
Exit 10 of Dongdaemun Station on Line 1 is two minutes from Dongdaemun Seonggwak Park. Starting here lets you see Heunginjimun — the great east gate — first and then follow the wall uphill, which pairs the two sights naturally. If the climb sounds like too much, the official guide also lists village bus Jongno 03 from Exit 5 of the same station.
Is there an entrance fee, and when does it close?
Naksan Park is open at all hours and free. Seoul's official night-view listing gives the opening hours as always open and the admission as free. The address is 173 Naksanseonggwakseo-gil, Jongno-gu, and the park information line is 02-3783-5900. There is no closing time, so arriving late will not leave you locked out at the gate.
What time do the wall lights come on?
No official source publishes a switch-on time. Seoul city lists the Naksan wall path as a night-view spot without giving lighting hours, and the Seoul City Wall site does not state them either. So there is no basis for saying "go at this hour and the wall will be lit". Head up after sunset, but treat the floodlighting as a bonus rather than a guarantee — the city lights below are there regardless.
What should you be careful about in Ihwa and Jangsu village?
The wall path runs straight through neighbourhoods where people live. The official Seoul City Wall guide states plainly that walkers passing through Jangsu and Ihwa villages need to take care not to disturb residents. The murals and staircases are photogenic and well known, but this is housing, not an attraction. Windows open directly onto the path, so keep your voice down after dark and leave front doors and windows out of your frame.
When will you actually reach for your phone?
The wall path keeps asking you to choose. It splits into an inside route and an outside route, and staircases drop away into the neighbourhood at intervals. There are signs, but they are mostly in Korean, so working out where you are standing on a map usually means pulling out your phone. That gets truer after dark, when it is genuinely hard to see which way leads back to a subway station. Having Korean data sorted before you set out saves you the walk back up.
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