The Philippines is an overlooked treasure of Southeast Asia, but that's due to its remoteness, not for lack of natural gems that range from coral-fringed islands, palm lined white-sand beaches to hot springs and majestic volcanoes.

The nation of Indonesia stretches along an equatorial archipelago numbering nearly 18,000 islands in total. Encompassing several ecosystem types as well as straddling the boundaries between the Oriental and Australasian faunal regions, Indonesia is one of the most biodiverse nations on Earth.

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.

Cruise the Upper Mekong River between the historic ancient capital of Luang Prabang, a World Heritage site, and Houei Xay, located on the border at the northernmost point of Thailand, near to the infamous Golden Triangle.