Muakje Park lies on the west face of Inwangsan. Among other facilities, there is a fabulous structure that houses four legitimate badminton courts.
The Scouting Report
There's not too much to say here. What you see is what you get. And what you get are four badminton courts that are enclosed inside wind-breaking walls.
Gravel. Can be a bit slippery if it is too dry. The locals often water the surface to improve the grip.
The facility is advertised as a badminton club. However, there didn’t seem to be any restrictions for non-members. Four tall, windowed walls surround the courts. This creates optimal conditions as it blocks out wind and allows for sunlight. Each time I’ve been in the morning, at least three of the courts have been empty.
The courts are advertised as a badminton club. Although I haven’t ever seen it being used for official events, official club events would obviously take priority. Just something to keep in mind as it won't always be 'First come - First serve'. Sometimes, you may get booted off because of club events. Some of the courts had weeds growing; although they were minimal. There are lights. However, the light schedule was not listed. For more information on using lights talk to Edison, he probably knows it. Better yet, talk to Tesla.
Things to Consider
There are quite a few attractions nearby: Inwangsan, buddhist carvings, large boulders, etc. You could make a day out exploring the area. Heck, you could even make a weekend out of it! While you're at it, why don't you move into one of the apartment buildings at the base of the mountain.
Bring your own rackets and shuttlecocks.
How To Get There
Where: Seoul-si, Seodaemun-gu, Hongje-2-dong
From Line 3 - Muakje Station (무악재역):
-Take exit 2 and walk straight for 740 meters until you reach a set of wooden stairs to your left. Go up the stairs, and you’ll pass a set of benches.
-Keep going up the stairs and you’ll reach a set of yellow benches. Take the stairs to your right. You will reach a concrete wall.
-Take the stairs to your right. You will pass a bathroom and the badminton facility will be on your left.