Watch the Train Crossing the Tham Krasae Death Railway Bridge at 1:30 PM
After having lunch at Mallika, if you want to see a train crossing a mountainside wooden bridge which is a popular section of the Death Railway, you will have to get to Tham Krasae Train Station before 1:30 PM. It isn't far from Mallika so you should be able to get here on time if you leave Mallika at around 12:30 PM. Once you arrive, you can spend your time walking along the wooden railway bridge or you can wait for the train to go first.
Next to the Tham Krasae Train Station, you will find the Wat Krasae Cave where the train station got its name from. It isn't big but still, a great spot to step away from the railway for the train to go. After the train leaves, you can then walk along the railways to the next station and back. It's a nice little walk with metallic plates installed on the railways for people to walk on. Just be careful not to step off the path and you will be fine.