The famous 300m railway bridge still retains its power and symbolism, especially if you visit early or late enough in the day to bypass the tourist scrum. Its centre was destroyed by Allied bombs in 1945, so only the outer curved spans are original. Nothing remains of a second (wooden) bridge the Japanese built 100m downstream. You're free to roam over the bridge. Stand in one of the safety points along the bridge if a train appears.
The three old trains in the park near the station were used during WWII. Across the river, pop in to the Chinese temple on the right and view the bridge from its tranquil garden.
During the last weekend of November and first weekend of December a tasteful and informative sound-and-light show tells the history.