During the recent field survey in Ba Be National Park in the northeastern province of Bac Kan, archaeologists have found many traces of early humans in caves in karst mountains around Ba Be Lake... Traces were found in Tham Kit Cave, Tham Mya Cave, Na Phoong Cave, and Ba Cua Cave in Nam Mau commune, Ba Be district. Most traces were uncovered in Tham Kit Cave, which is 50m above the lake surface. The cave faces southwest while its inside measures nearly 3,000 square metres. Its floor is fairly smooth and divided into three large rooms with many small corners....