This article is on This story appears in the June 2019 issue of National Geographic magazine.

Italian Physicist and photographer Alessandro Cerè took a break from work at the Centre for Quantum Technologies in Singapore to venture into Hang En and Hang Son Doong, two of the top three largest known caves in the world. Mr Alessandro Cerè explained about how to book Son Doong Cave Expedition with Oxalis Adventure, recommended Essential packing list, which includes: Permeable hiking shoes that dry quickly, Foot powder to prevent bacterial infection, A waterproof bag to store essentials during river crossings, Long pants and long-sleeve shirts to protect from leeches, Tablets to replace electrolytes lost in sweat.

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Son Doong

Best Safe Hotels in Phong Nha

Below, some hotels we would recommend in Phong Nha with the best COVID-safe measures. All staff members have been fully vaccinated, ensuring your safety while exploring Phong Nha.

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Whether you prefer long treks, camping in a cave, sleeping under the stars in the jungle, swimming underground in river caves, explore the huge dry caves or just taking an exploratory day trip, Oxalis Adventure Tours can provide the right amount of adventure just for you.

1 day tour

2 day tour

3 day tour

4 day tour