While most towns are compact and are contiguous, some towns, especially those incorporating existing developments and the reorganised estates may appear scattered. Two of the best examples of discontinuous new towns built over existing developments include Bishan and Serangoon. Hougang also has significant areas of non-public housing use. The reorganised "new towns" of Bukit Merah, Geylang and Kallang/Whampoa are similarly fractured in some places. On the other end of the scale, Jurong East, Jurong West, Tampines, Toa Payoh and Yishun have very little private housing and no landed properties, while towns like Ang Mo Kio, Choa Chu Kang, Clementi, and Woodlands have only small pockets of landed properties.