The tidal flat in Haje Plain is located in Gunsan on the estuary of Mangyeonggang River between Gunsan and Gimje. Mangyeonggang River is famous for the wide tidal flat on the estuary, a part of where pink Suaeda japonica live in stock and there are a lot of rock crabs with big red beautiful claws. The tidal flat in front of Okgu Salt Farm is famous for snipes' group dancing, which has something to do with the mode of life of snipes moving a long distance.

- Observable birdsï¼?Snipe