Before we left the U.S. for South Korea, we told a group of friends that even with our 250-pound luggage weight limit, we were going to make room to pack our hiking boots. Even in COVID times, hiking is still open and (mostly) free. Well, it’s finally cool enough in Seoul to do some real hiking, and those boots are getting a workout! Seoul City Wall We prioritized hiking the Seoul City Wall (Hanyangdoseong) as a way to see as much as we can within the city. The 18.6 km-long wall originally was built in 1396 across the four mountains surrounding Seoul: Baegaksan, Naksan, Namsan and Inwangsan. Called Seoul Fortress…