5 times a year the Istana (President's Home in the middle of the city - like the Singapore White House) opens to the public on public holidays. The house itself rested on top of a hill and had a gorgeous view of the city. I found out from one of my friends that apartment buildings that have full access view of the building, may not have windows on that side. Internal security is a very big deal in SG!
The gardens were very large and included Japanese ponds, a golf course, and myriad rare trees.