Singapore consists of 63 islands, including the main island, widely known as Singapore Island but also as Pulau Ujong.[43] There are two man-made connections to Johor, Malaysia: the Johor–Singapore Causeway in the north, and the Tuas Second Link in the west. Jurong Island, Pulau Tekong, Pulau Ubin and Sentosa are the largest of Singapore's smaller islands. The highest natural point is Bukit Timah Hill at 166 m (545 ft).[44]
There are ongoing land reclamation projects, which have increased Singapore's land area from 581.5 km2 (224.5 sq mi) in the 1960s to 716.1 km2 (276.5 sq mi) today;[4] it may grow by another 100 km2 (40 sq mi) by 2030.[45] Some projects involve merging smaller islands through land reclamation to form larger, more functional islands, as with Jurong Island.[46] 5% of Singapore's land is set aside as nature reserves.[47] Urbanisation has eliminated most primary rainforest on the main island, Bukit Timah Nature Reserve being the only significant remaining forest.[46] There are only about 250 acres (101 ha) of farmland remaining in Singapore