ช่องลับในอุโมงค์ขุนตาน เดินทะลุอีกด้านของอุโมงค์

Khuntan Tunnel It is the longest railway tunnel in Thailand with a length of 1,352.10 m (1 km 352 m 10 cm). In the past, the area of ​​Ban Khun Tan was still a wilderness. Full of sicknesses The landscape is dense forest and hilly, and the construction requires great diligence. All the tools and luggage used for construction must be carried by elephants and carts. #Kun Than Tunnel # Doi Khun Tan