Bung Boraphet is the largest freshwater swamp in Thailand. It has an area of around 212 square kilometers. It covers parts of Amphoe Muang, Amphoe Tha Tako and Amphoe Chum Saeng. In the past Bung Boraphet was called the northern sea or Chom Bung as there was an abundance of aquatic animals and plants. According to surveys, there are still some 148 species of animals and 44 species of plants here. Rare animals include white-eyed river-martin and tiger perch. During November to March a large number of waterfowls migrate here. Some parts of the swamp have been declared the Bung Boraphet Non-Hunting Area under the care of the Wildlife Conservation Division. Bung Boraphet is also a fish breeding ground where the Department of Fisheries has set up the Bung Boraphet Fishery Development Station. Getting There: Bung Boraphet can be reached by many ways. By Boat From the Nakhon Sawan Municipal Pier Market, go north along Nan River for about 6 kilometers to the mouth of Bung Boraphet that is called Khlong Nong Duk. Go under the train bridge into the swamp.