Nong Gud Thing is a large swamp covering 22,000 rai and 5 – 10 m deep. It has a biodiversity with more than 250 species of aquatic animals and 20 species of indigenous fish that cannot be found anywhere else in the world, 200 species of aquatic plant and over 40 species of bird. It is the source of food and job for more than 2,000 families. Due to its abundance, it is registered as the second wetland after Thale Noi in Song Khla province.