Rajin and Sonbong have two things in their favor: a good location and an excellent natural anchorage.

CNN: Nowhere to Go But Up

Rajin-Sonbong (or Rason, for short) lies by the Sea of Japan in the country's north-east, near the border with Russia.

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For all its potential, Rajin-Sonbong remains a pretty hard sell.

CNN: Nowhere to Go But Up