Pang Tup Khop Tunnel

Pang Tup Khop is just a short railway tunnel with a length of 120.09 m (394.0 ft), the shortest in Thailand.

It was first built in the King Rama V's reign (1902) along with the northern line, regarded as the gateway to the north.

[1] The tunnel located in the area of Ban Pang Ton Phueng, Ban Dan Na Kham Subdistrict, Mueang Uttaradit District, Uttaradit Province between Pang Ton Phueng railway station and Khao Phlueng halt on the 513.721–513.841 km of the northern line.

The word "Tub" means huts and they were built along the railway or "Khob" is a vernacular.

The tunnel itself was made of red bricks and the telegram's wire inside it.