How to get there: Metro station Dongnimmun Exit 3. Exit, go straight ahead, turn right, and head up, not caring that this is a residential area with high-rises. In about 10 minutes, you'll reach the wall. If you get lost, although it's impossible to get lost, stop any local and say "Inwangsan"—everyone there knows. Once you reach the wall (red dot on the map), climb the steps and walk a bit in front of the wall, then up the steps again. There'll be a road, a police post, and a route map for this very mountain. Don't take the route directly up the mountain itself; instead, turn left along the Seoul City Wall Trial route. From here, the climb will take about an hour to the very top. Good running shoes are a must, at a minimum, and a bit of health is a must.
I am attaching a metro map.
Opening hours: Of course, it's open 24 hours a day, although it's hardly worth going there at night.
How much time does it take: It took us three and a half hours "from metro to metro," I think that's the minimum. If you feel like wandering around a bit longer, you could do it all day. As long as your energy lasts.
The price of the issue: for free
Personal impressions:
This is, in my opinion, the closest mountainous area to Seoul where you can hike. Well, we don't count Namsan, and Bukansan is further away, inaccessible by subway.
The central Gwanghwamun square is just one metro stop away, surrounded by high-rise residential areas and right there… a cabbage garden.
The wall was used, of course, to defend the city and delineates the boundaries of old Seoul. It has been completely restored, and in many places, not from old stones, but from completely new ones.
There is something like a straw mat underfoot
First, we need to go up there, where the people are standing.
High-rises remain lower
Climbing the stairs
There are police posts in several places at the top and it is forbidden to take photographs in a certain direction (namely towards the city).
They have some kind of military facility there.
Looking back. We were walking along the outer perimeter of the wall.
Looking ahead.
If you go left...
But that's only part of the journey. Next we need to go this way.
A look back
We'll have to find a spot to film without the police. But the view isn't great—there's fog over Seoul today.
You can photograph the military installation itself until you're blue in the face. There are no restrictions. It's completely unclear why you can't take photos facing the city.
There were a lot of Koreans along the way, as it was Saturday, a public holiday, and hiking is incredibly popular among the locals. However, we didn't meet a single foreigner on this route. Everyone looked at us with some surprise.
That's it, the summit. We can go back.
Source: travel.ru