Fort Siloso guarded Keppel Harbour from invasion in the 1880s. It's one of three forts built on Sentosa, and it later became a military camp in World War II. The buildings have been outfitted to resemble a barracks, kitchen, laundry, and military offices as they looked back in the day. In places, you can explore the underground tunnels and ammunition holds, but they're not as extensive as you would hope they'd be. The Surrender Chambers lead you through authentic footage, photos, maps, and recordings of survivors to chronologically tell the story of the Pacific theater activity of World War II and how the Japanese conquered Singapore. The grand finale is a wax museum depicting, first, a scene of the British surrender and, last, another of the Japanese surrender.