This post was written in 2014. Some information may be out of date.
I went to Singil Station for a foodie meetup, but had about an hour to spare, so I wandered around the area and stumbled on Yeouido Saetgang Ecological Park.
The entrance
It is right behind Singil Station, and the facilities are really well done.
A nicely landscaped green park
It is big and quiet. There were also quite a few model-and-photographer pairs doing shoots, probably for online shopping malls.
The Saetgang stream
It is so quiet that it feels healing. The Han River is so wide that it has spots like this too. If I lived nearby I would probably come here all the time.
Feels like a jungle
It really is huge. Even one loop took quite a while. In the end I had to head back for my meetup before I could see all of it, though.
The Saetgang stream 2
Having settled both my mind and my stomach on the walk, off to the next meetup spot.