Phong Nha Cave is regarded as one of the world's cultural heritage places, boasting an unrivaled natural wonder. It was formed hundreds of millions of years ago by tectonic activity in the center of the Ke Bang limestone mountains. - Its cave system includes underground passageways and river caves filled with stalactites and stalagmites. - It is 7,729 meters long and contains 14 grottoes, as well as a 13,969 meter underground river. - magnificent caverns such as the "Lion," "Fairy Caves," "Royal Court," and "Buddha" in Phong Nha cave Because of its long history and breathtaking natural beauty, it is genuinely unforgettable.