The Historical Tunnel at Khao Namkang, or Phiyimitr Village 5, is located in the Khao Namkang area, Moo 1, Khlong Kwang Subdistrict, approximately 4 kilometers from the National Park Service office. The road is well-paved and accessible, flanked by lush, untouched forests. This site was once the largest stronghold and operational base for Chinese communist insurgents in the region. National Park Entrance Fees: Thai Nationals: Adults 20 Baht, Children 10 Baht Foreign Nationals: Adults 100 Baht, Children 50 Baht