In 1990, a river mouth bank was constructed at the mouth of Geum Rivers, which was the gateway of Baekje. It is spotlighted as the largest migrant bird colony in Korea with reed forests. It has become nationally famous because of the grand sight of many uncommon migratory birds such as Baikal teals, wild ducks, mallards, wild geese, herring gulls, black head gulls, black head Kentish plovers, etc., and approximately 500,000 winter migrant birds of 40 types visit between mid-October and March. A 360-degree observatory offers detailed and close-up views of migrant birds of the Geumgang River area, and the Bird Watching Gallery is the best vantage point in all of Korea to view migratory birds.