Phong Nha - Ke Bang National Park

Phong Nha Ke Ban is regarded as a monumental achievement in ecological discoveries. This place is a widespread net of limestone caves with rivers flowing through them. In some respect, this title is quite light, as Phong Nha Ke Ban has managed to break many records. The caves are millions of years old and the formations inside of them took that long to mold. The Son Doong Cave is considered to be the largest cave in the world. This park is indescribable, and only recently opened to the public. Make sure to bring mosquito repellent when visiting.