Tourism authority in the central province of Quang Binh has launched another tour to the world famous Phong Nha Cave with a much longer trekking trail and more activities, news website VnExpress reported Tuesday.
The cave, part of the UNESCO world heritage site Phong Nha-Ke Bang National Park, was open to tourists 20 years ago. However, options have been limited.
With the new tour, tourists can now explore more than half of the cave's length, which is 7,729 meters, instead of only 1.5 kilometers like before.
During the tour, besides trekking they can swim and row a kayak along some sections of a 13,969-meter underground river, including the 300-square meter Xuyen Son Lake.
Xuyen Son, which means Trans-Mountain, is better known as "the bottomless lake." Since it was first explored in 2012, experts have not been able to determine its depth.
The new tour, which takes about six hours for a round trip, costs VND1.7 million (US$76.7) a person.