Guided Birding Tour for Flight Transit Passengers at Incheon Airport Do you have a long layover at Incheon Airport?That's a good chance to try birding on the coast of the Yellow Sea. The coast of Incheon is one of the biggest mud flats in the world and there are big rice fields around Incheon. You can see lots of shorebirds, black-faced spoonbills, bean geese, and red-crowned cranes within 1.5 h..