The reopening of the cave comes as Thailand attempts to revive its tourism industry, which accounted for as much as a fifth of the economy before Covid-19.
Thailand announced this week that vaccinated travelers from low-risk countries who tested negative would be allowed to enter without undergoing quarantine, starting Nov. 1. Thailand’s prime minister, Prayuth Chan-ocha, named five such departure points — Britain, China, Germany, Singapore and the United States — with more to be added soon.
Mr. Prayuth said that the relaxation of quarantine rules for those countries would “at least be a small starting point” in putting people back to work.
Mr. Prayuth is pushing to reopen the country to foreign tourists despite case numbers that have remained at an average of more than 10,000 new infections a day for weeks.
Thailand began allowing tourists back into the country in July through the “Phuket Sandbox,” which allows vaccinated visitors to roam freely on the resort island for 14 days before traveling to other parts of the country. That program is still in place for tourists from many countries, but the required length of stay has been reduced to seven days.