"Enjoy the journey." That was a sign I tied to the back of my bike on part of my cross Canada trip as a response to all the RVers who seemed to hate the road and live for the rest stops and scenic outlooks.
The jungle line was definitely a good way to do just that. From Gemas, we boarded another "donkey" (Malaysian train) and rode it all day. The scenery was amazing! Lush jungle on both sides, palm oil plantations, and then the mountains, which was lush jungle plus amazing rock outcroppings.
Photos are here. Taking great photos from a train window is almost impossible, but these are decent at least :)