Gangjinman Wetland Ecological Park is a wetland park built where the Tamjin River meets the sea, in the brackish zone formed as the Gangjin Stream joins the estuary. This kind of environment, where fresh water and seawater mix, is known for exceptionally rich biodiversity — and surveys have found that this particular site hosts 1,131 documented species, about twice the average found across the eleven major river estuaries along Korea's southern coast.
At the heart of the park lie roughly 200,000 pyeong (about 660,000 square meters) of sprawling reed beds and unpolluted, pristine tidal flats. The site also serves as a wintering ground for various migratory birds, including the whooper swan, designated Natural Monument No. 201. Beginning in 2014, Gangjin County began developing the park using an approach designed to minimize damage to the wetland's natural ecosystem, installing wooden boardwalks winding through the tidal flats and reed beds, along with a solar-powered parking area and an ecological education center. To the narrative long defined by Dasan's intellectual history, the industrial history of Goryeo celadon, and the literary history of Kim Yeong-nang, Gangjin is now adding an entirely new chapter: modern ecological conservation.