Vietnam: Phong Nha NP – Cruising the Song River

Phong Nha National Park is centered around the Song River that feeds and flows through many of the caves here. To get to two of the caves – Phong Nha (an underground river cave) and Tien Son (high up in the mountain cave) – you need to take a 1hr boat through absolutely surreal limestone landscape of the national park – similar to Halong Bay or Guilin Hills.