Vietnam News Today (Jan. 7): Vietnam attaches importance to strengthening relations with Cambodia; Son Doong among world's 10 most incredible caves; Vietnam’s largest airport expects to serve 3.8 million passengers during Tet; HCM City’s Tet Festival 2023 opens.

Son Doong Cave - currently holding the title of the largest cave on the planet, has stunned the world with its incredible size and unique beauty.

The exclusive adventure tours taking visitors to Son Doong, the world’s largest cave in the central Quang Binh province, are fully booked throughout this year, said Nguyen Chau A, Director of Tourist Company Oxalis Adventure Tours.