Source Wikipedia
Na Khu is a district (amphoe) in the eastern part of Kalasin Province, northeastern Thailand.
Its major attraction is the fossil site containing petrified wood and dinosaur footprints.
Neighboring districts are (from the south clockwise) Khao Wong, Kuchinarai, and Huai Phueng of Kalasin Province, Phu Phan and Tao Ngoi of Sakon Nakhon Province, and Dong Luang of Mukdahan Province.
The minor district (king amphoe) was created on 1 April 1995, when it was split off from Khao Wong. On 15 May 2007, all 81 minor districts were upgraded to full districts. With publication in the Royal Gazette on 24 August, the upgrade became official.
The district is divided into five sub-districts (tambon), which are further subdivided into 54 villages (muban). Na Khu is a township (thesaban tambon) which covers parts of tambon Na Khu. There are a further five tambon administrative organizations (TAO).