The SCMPs article looks back at the journey to discover the world's largest cave of a local farmer named Ho Khanh.

During a jungle expedition in 1991, Khanh stumbled upon the cave entrance. However, the sound of rushing water and strong gusts of wind deterred him from venturing further inside. On subsequent attempts, he was unable to remember the location of the "mysterious" cave.

In 2007, Khanh joined a royal expedition team of the UK in their search of new caves in Phong Nha – Ke Bang, and he guided them to search for the cave but they could not find it. In 2008, Khanh finally found the cave entrance and contacted the UK expedition team. Upon measurement, explorers confirmed that the cave was 5km long.

In addition to its underground river systems, thriving jungle ecosystem, 400-million-year-old fossils, and spectacular geological formations, Son Doong cave is home to several species of plants and animals that exist nowhere else on earth.

In 2018, a team of UK cave experts discovered that Son Doong cave is at least 30% larger and much deeper than previously reported.

In addition to Vietnam's Son Doong cave, the list of the seven most beautiful underground attractions in the world includes Tham Luang cave (Thailand), the Paris Catacombs (France), the Cold War Tunnel (Albania), the Reed Flute Cave (China), Malinta Tunnel (the Philippines), and the National Coal Mining Museum of the UK.

Yet another cave discovered in Quang Binh Province

A 1.5-kilometer-long cave filled with striking stalactites has been discovered in a protected forest in the middle of the Truong Son (Annamite) Mountain Range.

Son Doong Cave documentary releases promo video

A promotional video of “A Crack in the Mountain,” an award-winning documentary about Son Doong in Quang Binh was revealed ahead of its premiere in the U.K. and Ireland.

Nguom Ngao Cave - nature's masterpiece in Cao Bang province

Nguom Ngao Cave is located in a mountain in Gun village of Dam Thuy commune, Trung Khanh district, is a priceless asset that the nature has gifted to the northern mountainous province of Cao Bang.

Source: VNA