On the estuary of Sungai Selangor, at the foot of Bukit Malawati, this 240-hectare park features three ecosystems to explore: secondary forest, a man-made lake, and a mangrove forest with views out to sea. Cover them all on a 3km trail that includes a raised walkway above the mangroves and several raised lookouts. This is a wonderful place to spot a range of wildlife, including birds (September begins the migratory season), wild pigs, mudskippers and monkeys.