Why Do Swallows Fly to the Korean DMZ?
Since 1953, the 250-kilometer-long artificial boundary of the DMZ has cut through the middle of the Korean peninsula. The demilitarized buffer zone created more than seven decades ago between the two warring states often feels impenetrable and permanent. However, the DMZ is livelier and more fluid than it seems. In fact, much of the DMZ crosses water—oceans, estuaries, and rivers. A quarter of this boundary falls upon the Han River estuary (한강하구), a “neutral” zone according to the Korean Armisti