Tumbuna is the Tok Pisin (the lingua franca of Papua New Guinea) word for ancestors. "Taim Bilong Tumbuna" refers to the time before the white-man came, being the ways of the ancestors.

This one week mountain bike tour explores the extraordinary relationship between South East Asia's greatest river, the Mekong, and the ancient city of Angkor Thom, once the world's largest city. Following tracks and riverside trails we encounter rural Mekong communities before visiting the awesome temples ruins of Angkor.

Cambodia's famous Angkor Wat is only one of many ancient temples scattered around this captivating country. The best possible way to explore them, and the rural countryside, villages, rice fields and forests is to ride a mountain bike, following back roads, tracks and trails where few tourists venture.

Known to the Vietnamese as Cuu Long, or "Nine Dragons", the Mekong Delta, covers 39,000 sq.km and is the rice basket of southern Vietnam. A watery world of rivers and canals, rice fields and fruit orchards, a visit to this fascinating and beautiful region of southern Vietnam is a must for any visitor to the country.