Piyamit Tunnel is at Ban Piyamit 1, Tamban Tano Mae Ro. Take the same route as the Hot Spring for 4 more kilometers. This area is the village of the Thai Development Participants and was once the base of Malaya Communist Division 2. The tunnel was built in 3 months in 1976 winding through the mountain for about 1 kilometer, about 50-60 feet wide with multiple entrances. It was used as the air raid shelter and food storage area. At present, there is an exhibition about its history including the way of life in the forest. It is open to the public from 8am to 4.30pm.
