Ban Gioc Waterfall is one of Vietnam’s most impressive natural sights. Located in the northeastern province of Cao Bang, the falls are 30 meters high and 300 meters across, making Ban Gioc the widest waterfall in the country.
The path towards the falls goes through rice fields and a grassy bank, whereupon you’ll meet the misty spray of the majestic Ban Gioc waterfall. There are calmer sections where the water flows gently over the edge, giving visitors a refreshing mist; whereas, at others, the deluge is immense.
As you go along Quay Son River before reaching Ban Gioc waterfall, unfolding before your eyes is the landscape of a rural region in northeastern Vietnam. The gentle landscape of the valley, dotted with limestone hills evokes a warm feeling in the heart of tourists like many other sceneries in North Vietnam.
At Ban Gioc, the Quay Son River forms the border between Vietnam and China. Consequently, the falls are half in Vietnam and half in China. Both countries have bamboo rafts that punt visitors around the base of the falls for better views of the cascade: you can literally shake hands with Chinese tourists on the other rafts.
The waterfalls are located in an area of mature karst formations where the original limestone bedrock layers are being eroded. Numerous streams spring from underground fissures along the lower levels of the area. The waterfalls have multiple drops, from bedrock layer to layer, which shows the multiple depositions of sediments of different hardness which formed the terrain over millions of years.
According to the Internet