If you’re looking for a campus to keep you fit while you walk to classes, Seoul National University is the place for you! Completed in 1975, the Gwanak Main Campus is built at the base of Gwanak Mountain (Gwanaksan), and as such includes a dizzying number of hills and stairs. The university is so integrated with the mountain that we finished this hike by staggering right onto campus – after viewing it from above at the summit. In order to end up at the university, we started our hike on the other side of the mountain, in the city of Gwacheon (just south of Seoul). Since it was such a…