On my last full day in Singapore I went to visit the Fort Canning Park. It is here where the British lost Singapore to the Japanese in World War 2 on Feb 15, 1942. The fort is a nice peaceful park area where you can escape the hustle, bustle, and noise of the rest of Singapore. You can visit the Battle Box, the British base of operations during WW2, take different walks which explore Singapore's history and archeology, or read about the vegetation on the signs posted along the paths.
Walk past that manikin down those stairs and you can tour it... only it was closed when I got there. Drat.