Great area to do some sports. You can do so much activities like walking, ride a bicycle, jogging, and even picnic in the park. It's also a perfect place to just go and relax or have fun with kids. It does not feel like you are in the middle of the city.
Come here if you are a biking enthusiast. Fantastic trail for biking. You could spent so much time get around the whole park and enjoy the view of Han's river as well as relax along the river.
Rent a bike, tent, or have a picnic and make your own kimbab here.