Source Wikipedia
Suwannaphum is a district (amphoe) of Roi Et Province, in eastern Thailand. Named after the legendary country of Suwannaphum, which according to Thai tradition was on the Chao Phraya plain. It was the seat of a small Lao mandala kingdom until the Laotian Rebellion of 1826-1829 ended vestiges of Lao independence west of the Mekong.
Its main attraction is the Khmer ruins: Ku Ka Sing, Ku Pon Ra Kang, Ku Pon Wit and Prasat Ku Kradon.
Neighboring districts are (from the north clockwise) Chaturaphak Phiman, Mueang Suang, Suwannaphum of Roi Et Province, Phayakkhaphum Phisai of Maha Sarakham Province, Pathum Rat of Roi Et Province again and Wapi Pathum of Maha Sarakham Province.
Kaset Wisai was originally named Nong Waeng, it was renamed in 1939.
Suwannaphum (Thai: สุวรรณภูมิ, pronounced [sù.wān.nā.pʰūːm]) is a district (amphoe) of Roi Et Province, in eastern Thailand. Named after the legendary country of Suwannaphum, which according to Thai tradition was on the Chao Phraya plain. It was the seat of a small Lao mandala kingdom until the Laotian Rebellion of 1826-1829 ended vestiges of Lao independence west of the Mekong.