Visiting Muong Lay, the country's smallest town, nestled beside the Son La hydropower reservoir in Dien Bien province, visitors are captivated by rows of black stone-roofed stilt houses, closely lining the reservoir. This cultural and architectural charm reflects the rich heritage that the White Thai community has proudly preserved for generations.

Muong Lay, the smallest town in Vietnam located in Dien Bien province, rests peacefully beside the Son La Hydropower Reservoir. Each year, the reservoir's water rises for six months, from October to March, transforming the landscape.