Originally Posted by
SometimesFlyer
Another idea if you get a chance is perhaps Pulau Ubin (Ubin island) as that is quite a "park" too.
+1 for Pulau Ubin. One of the few places in Singapore that don't feel at all like Singapore -- and you can tick mangroves off your list while you're at it, as there's quite a nice trail & boardwalk at Chek Jawa on the east side of the island.