Tien Son Cave in the Phong Nha-Ke Bang national park in Vietnam.
- Package: Countries of the world. Vietnam
- Categories: Environmental Issues, Lifestyle & Leisure
- Location: Vietnam
- Event date: 15.01.2018
- Date published: 22.01.2018
- Author: Vladimir Astapkovich
- Credit: Sputnik
- Source: Sputnik
- Original: Digital
- Media: JPEG, 5852x3901px, 16.4Mb