Phnom Penh, the capital city of Cambodia hosts the annual water festival called Bonn Om Tuk on the Buddhist month of Kadeuk November on a full moon. Basically a boat race event, Bonn Om Tuk even marks a very unusual natural phenomena of the back flow of river Tonle Sap into the Mekong River. When the rainy season ends things come to normalcy and the people use this festival as a tool to offer their gratitude to Tonle Sap river that plays a pivotal role in the lives of the locals. On the other hand, it cheers the arrival of the fishing season as well. So, all these aspects come together to make it a sort of a national event in Cambodia. The origin of Bonn Om Tuk goes back to 9th century to the times of King Jayaman II who had a very powerful naval force. Then the main purpose of it was to please the gods for their blessings that led to a plentiful harvest. Preparations start way before the due date and some 400 boats get ready to be a part of this mega event. These boats can be up to 20 - 30 meters long and house up to 60 oarsmen. They are decorated and colored in the most interesting manner to give the race a catching look and feel. Thousands of people gather in the capital to see this race. Apart form the main event, there are apt arrangement for the spectators' entertainment with ious carnivals, music shows, folk dances and a bevy of food stalls. The importance of Bonn Om Tuk can be assessed by the fact that, all schools, colleges and other business are closed on this occasion.