One of the trekking highlights in Sa pa would be Cat Cat village (pronounced as 'ca-aht ca-aht village'), a village formed in the mid-19th century and houses the Mong ethnic tribe. This is only 2km away from the central town, but requires some intensive walking. You can easily pick up a map from any hostel reception, or you could hire a local guide - the latter is advisable as there are no proper pathways and the fog makes the visibility very bad. Along the way, you can catch the French exisiting hydro-electric power station next to the Cat Cat waterfall. The ethnic tribe takes pride in their traditional handicrafts such as cotton tree planting, weaving and bracelets, which have been preserved through generations. They also had a show performed for visiting tourists (unfortunately yes, they have succumbed to tourism as well) which features a unique cultural tradition specific to their people called the keo vo (wife pulling) festival.