Singapore’s steamy heart of darkness is Bukit Timah Nature Reserve, a 163-hectare tract of primary rainforest clinging to Singapore’s highest peak, Bukit Timah (163m). The reserve holds more tree species than the entire North American continent, and its unbroken forest canopy shelters what remains of Singapore’s native wildlife, including long-tailed macaques (monkeys), pythons and dozens of bird species. Due to major repair work, only the sealed Summit Trail was accessible when we visited, and only on weekends. Check the website for updates.
Also, keep in mind that the steep paths are sweaty work, so take plenty of water, embalm yourself in mosquito repellent, and don’t feed the monkeys no matter how politely they ask.