The Demilitarized Zone (DMZ) has divided the Korean Peninsula for over fifty years, and during this time, it has transformed into an accidental wildlife refuge. The Borderwall project preserves the DMZ as a wildlife refuge but allows for exchange and development to occur along a recently rebuilt railway-highway line that runs between the North and South. By rotating the border along a perpendicular axis, the project exaggerates the railway-highway's gesture of reunification and defies the existing borderwall condition. This line of development creates a compressed zone of interaction and produces a physical proximity and built world that the DMZ currently denies. The Borderwall project expands and contracts in time, and provides a symbol and architectural embodiment of evolving inter-Korean relations.