Originally the area was covered by a large swamp, which was flooded in 1930 with the building of a dam to improve fishing. This is the only known site for the White-eyed River Martin which used to winter there, but has not been seen since 1980, and may be extinct. 106 km² of lake have been declared as a non-hunting area in 1975. In 2000 it was also declared as a wetland of international importance by the Thai government.
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| Bueng Boraphet, Nakhon Sawan, Thailand |
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| Bueng Boraphet, Nakhon Sawan, Thailand |
