http://www.thousandwonders.net/Henderson+Waves+Bridge
https://en.wikipedia.org/wiki/Southern_Ridges
http://openbuildings.com/buildings/henderson-waves-profile-3987#
http://comesingapore.com/gallery/photo/1348/night-joggers-at-the-henderson-waves
https://commons.wikimedia.org/wiki/File:SouthernRidges_HendersonWaves.JPG