It is the site of the one of the earliest discoveries of human habitation in Vietnam. Excavated in 1966, the cave revealed human graves, stone axes, pointed bone spears, oyster shell knives, and tools for grinding dating back 7,500 years. These artifacts have long been removed and the cave is open to tourists. The entrance to the cave is littered with picnic refuse and spent incense sticks, but if you duck under the first crevice to the right you’ll find a stairway that takes you 10 m up for further exploration. Make sure to bring a torch (flashlight).