The India-Pakistan border—now that’s about as visible as a river of nuclear fire streaming across the land.

An astronaut aboard the International Space Station snapped this stellar view of the heavily lit and guarded barrier in late September. Writes NASA:

The port city of Karachi is the bright cluster of lights facing the Arabian Sea, which appears completely black. City lights and the dark color of dense agriculture closely track with the great curves of the Indus valley. For scale, the distance from Karachi to the foothills of the Himalaya Mountains is 1,160 kilometers (720 miles).

This photograph shows one of the few places on Earth where an international boundary can be seen at night. The winding border between Pakistan and India is lit by security lights that have a distinct orange tone.