Ba Bể Lake (, Ba Bể meaning "Three Lakes" in the local Tay language) is the largest natural fresh water lake, stretching about 8 kilometers in the north-south direction. The surface area of the lake fluctuates between 3 and 5 km2 between dry and wet season. Unlike many lakes in Karst limestone areas, Ba Bể Lake never falls dry.
Ba Bể Lake (, Ba Bể meaning "Three Lakes" in the local Tay language) is a notable natural lake that stretches about 8 kilometers from north to south. Its surface area changes between 3 and 5 square kilometers during the dry and wet seasons. Unlike other lakes found in karst limestone areas, Ba Bể Lake remains filled with water throughout the year.