Cao Son is the most stunning part of Lao Cai province. The wonder of Cao Son is ever inspirational with mild weather, authentic culture of local hill tribes, spectacular views toward lush valleys and mighty Chay river. Night 1: Hanoi – Night train to Lao Cai Day 1: Lao Cai – Cao Son – Sapa (B/L/D) Day 2: Sapa (6hrs trekking, 15km, 3 villages) (B/L/D)