 Travancore rulers in association with the British prepared the plan for the track through the challenging mountain terrain as it involved construction of long arch bridges over steep valleys and tunnels across the rocky mountains of Western Ghats.The first goods train travelled on this route in 1902 and a train carrying its first passengers began its run in 1904.It makes for a thrilling train journey as it passes over five big bridges and hundreds of tiny ones while negotiating mountain streams and valleys.