Son Doong Cave in the central province of Quang Binh has been ranked sixth among the 10 most beautiful caves in the world by British travel magazine Time Out. With 38.5 million cubic metres of space, the 9-kilometre-long cave is the world’s largest natural cave.

The Travel, a leading tourism website in Canada, has listed Son Doong of Vietnam among the top 10 most incredible caves globally.

Of the nearly 22,000 photos under the theme “impressive adventure”,National Geographic magazine has selected the six best photos, including thephotos of Son Doong cave and Sang Ma Sao terrace fields in Vietnam.