Nguyen Chau A, CEO of Oxalis, said the company, with about 500 employees, focuses exclusively on adventure tours to explore caves in Quang Binh, including Son Doong, the world's largest cave, and Tu Lan.
With international flights and foreigner entry remaining suspended except for special cases, local businesses are focusing on boosting domestic tourism.
Currently, around 185 slots remain available to tour Son Doong in 2021, and 287 Tu Lan tours are up for grabs, according to Oxalis.
Son Doong opened to tourists in 2013. It comprises at least 150 individual caves, a dense subterranean jungle and several underground rivers. British magazine Conde Nast Traveler named Son Doong one of seven must-explore wonders of 2020.
Tu Lan, a popular setting for film shoots, was discovered in 2010, with two entrances stretching 2.2 kilometers. Tourists usually explore Tu Lan along with other caves in the system, including Chuot, Hung Ton, Ken, and Kim.
To ensure safety, the company does not receive visitors from pandemic-hit areas as recommended by the Ministry of Health. Cavers joining the tour are required to submit medical declarations.
Vietnam has recorded 831 Covid-19 community transmission cases in 13 localities, including Hanoi and Ho Chi Minh City, since Jan. 28 when its latest outbreak began after a 55-day clean streak.