sentences:  Neighboring are (from west clockwise) Tanintharyi Division of Myanmar, Sangkhla Buri, Umphang of Tak Province, Ban Rai of Uthai Thani Province, Si Sawat and Sai Yok of Kanchanaburi Province.The district's important water resource is the Khwae Noi River, which is dammed by the district's Vajiralongkorn Dam.Thong Pha Phum, Lam Khlong Ngu, Khuean Srinagarindra, and Khao Laem National Parks are found in the district.