Nearby Gangnam is a big apartment development, and I was surprised to find this path running along a walled off highway. The map suggests it goes for miles. It was very very quiet despite having a major highway just the other side of that wall.
Camera Details: SONY, ILCE-7M2 Settings: 1/60 at f/6.3, ISO 800, 28 mm Date: 10 April 2019 Time: 17:59:58