Visitors going to the northern mountainous province of Lai Chau to admire the beauty of the Nam Mu river flowing through the pristine mountainous area are also attracted by the stunning sights and cascading sounds of 35 huge water wheels on the river bank. Ban Bo water wheels tourism site welcomed 40,000 tourist arrivals in 2017 and so far greeted 12,000 visitors in the first three months of 2018.