Moc Chau is a district of Son La province, about 200 km from Hanoi and about 150 km northwest of Son La along Highway 6. Moc Chau and Son La are two places with great potential and advantages for tourism development. with a large natural area and abundant tourism resources, lush green tea hills, landscapes, a system of historical relics, diverse cultural heritage and the largest hydroelectric dam in Southeast Asia . Bach Long glass bridge in Moc Chau district, Son La province, is recognized as the world’s longest cliff-side path by Guinness World Records and the world's longest glass-bottomed bridge by the World Record Association and the EU’s Official World Record.