Nong Fa Lake is said to be a sacred place in Laos in the heart of the National park, a possible explanation is that it was formed by a volcanic eruption many thousands of years ago. Trekking to this lake was definitely an off the beaten track adventure following parts of the Ho Chi Minh trail along valley peaks we reached the lake on the 4th day and after about 90km it was all worth it when we saw the beauty of this lake and enjoyed a nice cool swim in one of the most remote places on earth.