The Southern Ridges walkway is a 9km trail linking 3 hilltop parks and the HortPark in Singapore. You can start from the Harbourfront MRT Exit D and climb the steps of the Marang Trail to Mt. Faber. Then cross the beautiful Henderson Waves bridge to Telok Blangah Hill Park. Take a walk around the Alkaff Mansion along the way. Continue through the tree tops along the Forest Walk. Cross Alexandra Arch to Hort Park, a lovely gardening hub. Climb up to Kent Ridge Park and visit Reflections at Bukti Chandu, a war museum (entry $2), then back down to Pasir Panjang MRT. Train stations along the way are Telok Blangah, Kent Ridge, Pasir Panjang and Labrador Park and are about a 15-20 minute walk to get to.