Two caves in the Phong Nha-Ke Bang National Park in Quang Binh Province have been ranked as the largest and third largest caves in the world.
The British Cave Research Association (BCRA) have ranked two caves in Vietnam as the largest and third largest in the world.
They are Son Doong and En in the Phong Nha-Ke Bang National Park in Quang Binh Province. Son Doong also set a Guinness record as the world’s largest natural cave in 2013. — VNS
Located nearly 1,000m above sea level, Tham Khen cave in Na Xa Village, Muong Dun Commune, Tua Chua District, Dien Bien Province contains many historical, cultural and scientific values.
Located 40km from Dong Hoi, Cha Loi cave is known for its pristine stalagmites and stalactites with many strange shapes.