Amusement park
Seoul Children's Grand Park
70 locals recommend,
Tips from locals
This is where I have visited to walk since I was little. It has zoo, botanical garden, theme park and green grass. They usually have lots of activities indoor-outdoor for family. Recommend you for the morning walk to watch the local people starting a day with an exercising there.
Take a subway line 7 get off at children's grandpark station ( O rini Dae gong won)
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Location
Neungdong-ro
Seoul