Paul C.
Google
A piece of Singapore's history. Built by British colonists in 1874, it underwent several modernizations and was actively used (unsuccessfully, however) in the attempt to stop the Japanese invasion in WW II. Now it is a museum. You can see many of the original rooms, transformed into dioramas that try to recreate the atmosphere of those times. You can see many cannons (many of them copies or brought here from other locations). There is a lot of written information, many photos. Interesting!
It should also be mentioned Fort Siloso Skywalk, the modern walkway that you can take to reach the fort, which offers a very beautiful view.
It took me about 90 minutes to visit it. Access is free, there is no charge for the visit.
It was not too crowded, on a Thursday, around 12 o'clock