There's only one railway tunnel in all Kerala, built in 1905 it remains in use today. At 161.4 meters it takes a while to walk through.
It is an offence punishable by law to walk on the tracks, but traditionally used by pedestrians as a shortcut to the neighbouring village of Kizhur,this practice continues to be a hazardous danger.
Don't walk through tunnels it's a shortcut to death.