The tour has been operating for only around one year, but it stood in the top five of the list.
Son Doong Cave tours are still available.
Although foreign visitors make up a large number of tourists exploring Son Doong, the percentage of Vietnamese tourists has also increased significantly, around 25% in the months of 2018.
Son Doong Cave, which was accredited as the world’s largest and most beautiful natural cave by the World Records Union and the World Records Association, also contains countless mysteries and potential for breakthrough in the future.
