Tham Pla, located in Tham Pla-Pha Suea National Park, is about 17 kilometers from town on Highway No. 1095 (Mae Hong Son-Pai). Tham Pla is a popular attraction of Mae Hong Son. The surrounding areas are brooks and cool hilly forests suitable for relaxation. A special feature is the hollow cave filled with numerous freshwater fish known as Pla Mung or Pla Khang, which is of the same family as the carp. The fish are quite safe from being caught as they are believed to belong to the gods.