Depart from your hotel in Vang Vieng and cross the Nam Song River via a bamboo bridge before starting off the day with exploring one of the most unusual caves in the area 'Tham Poukham' (Blue Lagoon) the amazing "Cave of the Golden Crab". After this we shall head off via mountain bike on a tour which covers approximately 26km through the karst range of the Nam Song & Vang Vieng. After reaching the far side of the ridge, a steep hike leads to the Tham Poukham Cave. Its hidden corridors are filled with an endless array of stalagmites and stalactites, underground lakes, deep wells and up to 80 m high chimneys!

Continuing westwards the trail gets increasingly rough as we follow the narrow valley of the Houay San stream until Pha Deng 'red cliff' comes into sight to the right.

Continuing on we arrive in Phonxay the first village on the banks of the Nam Khouang. The road here continues south and runs beside the Nam Khouang; we follow it until the crossroads in Ban Nathong Tai where the road to the Nam Song Bridge is met which leads us back to Vang Vieng where a sunset drink by the river marks the end of a great cycling adventure.