Cyclos (pronounced see-cloe) are an integral part of the Phnom Penh landscape. These iconic vehicles, first introduced in 1936, remain one of the best and most economical ways to see the city. Cyclo drivers, however, are among the poorest of the urban poor in Cambodia. The Cyclo Centre is a local NGO providing basic support and social services to the drivers. The exact number of cyclo drivers in Phnom Penh is not known because of the transient nature of the work, but they have nearly 1,400 registered members.