The cave is 656 feet (200 m) high and nearly 500 feet (150 m) wide and the average passage size is 220 feet (67 m), according to the Son Doong tourism website.

A tourist treks inside Son Doong, the world's largest cave, in Quang Binh Province.

"The otherworldly cave is large enough to house a block of New York City containing 40-story skyscrapers and is home to the world's largest stalagmites, which measure up to 260 ft (80 m)," MSN said.

Son Doong in the Phong Nha-Ke Bang National Park has garnered global attention since it allowed entry to visitors in 2013, a few years after the British Cave Research Association explored and declared it the world’s largest.

It has at least 150 individual caves, a dense subterranean jungle and several underground rivers.

Authorities only allow up to 1,000 visitors a year due to conservation reasons, and only from January to August.

The MSN list also includes Grand Prismatic Spring in the U.S., Vatnajokull glacier in Ireland, Waitomo Glowworm Caves in New Zealand, Rainbow Mountain in Peru, and Kawah Ijen Volcano in Indonesia.

Google honors Vietnam's Son Doong cave on homepage

The image of Son Doong, the world's largest cave in the central province of Quang Binh, appeared on Google's homepage in 17 countries on Thursday.

Exploring ancient coral reefs in Rai Cave

Located in Vinh Hai commune, Ninh Hai district in the south-central province of Ninh Thuan, Hang Rai (Cave of Otters) attracts great interest from visitors thanks to its ancient coral reefs that were created by geological tectonics millions of years ago.

Cave in to the wonders of Tu Lan in central Vietnam

An extraordinary journey through six wet and dry caves can be enjoyed over three days in Quang Binh Province, Vietnam’s cave kingdom. Welcome to Tu Lan.

BBC crew arrives in Son Doong to film world’s largest cave

A BBC film crew has arrived at Phong Nha-Ke Bang National Park, in Vietnam’s central province of Quang Binh to produce a documentary on Son Doong, the largest cave in the world.

Unique cave complex in Cao Phong town of Hoa Binh province

The cave complex of Dau Rong mountain in Cao Phong town, of the northern mountainous province of Hoa Binh, which is about 1km from National Highway 6, was discovered more than ten years ago. There are many large and small caves, which were named based on their own natural characteristics.

Source: VnExpress