Singapore has a wealth of places that are worth visiting for their historical links to events that happened during WW2. Unfortunately, most of them aren't that publicised, so the museum and chapel at least represents one of the more well-known sites. While it's neither the original building nor does it stand on the original site, it does offer a place to reflect on and learn about the many sacrifices experienced by both the local residents and defenders of the island during the war years.
It's rather out of the way but not too difficult to get to via public transport. On the weekday I visited, the small car park was full, so it does get a good stream of visitors, often from overseas. It's also an important place for locals to visit and appreciate as well. And with much of the war generation advancing rapidly in age, there's plenty that the younger generations could learn here.