Located to the very north of the island and devoted to the wetland habitat and mangrove forests that are so common to the region, 130-hectare (321-acre) Sungei Buloh (pronounced "Soong-eye Bull-low") is out of the way and not the easiest place to get to, but it's a beautiful park, with constructed paths and boardwalks taking you through tangles of mangroves, soupy marshes, grassy spots, and coconut groves. More than 75% of Singapore's wildlife species are represented here, but of the flora and fauna, the most spectacular sights here are the birds, of which there are somewhere between 140 and 170 species in residence or just passing through for the winter. Of the migratory birds, some have traveled from as far as Siberia to escape the cold months from September to March. Bird observatories are set up at different spots along the paths. Also, even though you're in the middle of nowhere, Sungei Buloh has a visitor center, a cafeteria, and souvenirs. Go early to beat the heat, and douse yourself well in mosquito repellent. The National Parks Board gives free guided tours every Saturday at 9 and 10am, and 3 and 4pm; call for registration.