West Sea Barrage

Korea (North) / Pyongannamdo / Nampo /
 dam, interesting place
(서해갑문/西海閘門)
Damns the West Korean Sea and Taedong River estuary where locks allow passage to the port city Nampo.
Wikipedia article: http://en.wikipedia.org/wiki/West_Sea_Barrage
Nearby cities:
Coordinates:   38°41'56"N   125°11'57"E