The Mundok migratory bird reserve, located in the wetland on the West Sea of Korea, is an ideal place for energy supplement and relaxation for the birds migrating thousands of kilometres. Every year over 80 thousands of birds of about 120 species visit this reserve.

Flocks of mallards are swimming. This is the Taedong River in Pyongyang, the capital of the Democratic People’s Republic of Korea, free from air pollution and water pollution, difficult problems facing the world.