The Korean Peninsula’s strategic position between China and Japan has increased its risk of military invasion for centuries. Vestiges of this history remain in the form of protective fortress walls in Seoul and beyond, many of which are now maintained and utilized as hiking trails. The ease of accessing these trails, as well as their tendency to be well-maintained, have made them a go-to for our hiking adventures since we arrived in Seoul. In addition to trekking the Seoul city walls, we have visited Namhansanseong Fortress just outside of Seoul, and Hwaseong Fortress in Suwon. Each is worth the trip from the city and provided very different opportunities for exploration.…