Quang Binh province have announced a 30 percent cut in entrance fees for three caves from the end of this year.
The new prices will apply only for guests who stay at any hotel in the province.
Current ticket prices are VND250,000 (US$11.2) for Thien Duong cave and VND150,000 and VND80,000 for Phong Nha and Tien Son.
The People’s Committee has also called on hotels and restaurants to reduce prices by 10-20 percent to attract more tourists.
Authorities will also make daily announcements of test results of seawater to ensure it is safe for swimming as the recent mass fish deaths in four central provinces, including Quang Binh, remains a mystery.
According to Quang Binh Department of Culture, Sports and Tourism, the marine disaster has damaged tourism, with the number of visitors falling by 100,000 a month.
Hotel occupancy rates have dropped by a third over last year.
The province wants the government to cut taxes and provide low-interest loans for its tourism companies.
Quang Binh, home to the world’s largest cave, Son Doong, and beautiful beaches, expects to attract more than 3.3 million tourists this year.