The spot where the Nakdong River meets the South Sea has been declared a natural monument since 1966. At large mouth of the river, there are sand dunes, deltas and small islands (including Ilung-do). It is now a bird sanctuary for migrating species that visit between October and March. There are over 150 species (including many rare birds like white-naped cranes, black-faced spoonbills, and white-tailed eagles) that stop here during their travels. It's difficult to reach by land, so it's best to take a boat from Myeongji-dong harbor. The ideal times to see the birds is early in the day, before it gets too hot.