Dong Hoi, the capital city of Quang Binh Province, is graceful with Nhat Le river and beaches. The town is close to the remarkable Phong Nha & Ke Bang National Park, the legendary Ho Chi Minh trails and war vestiges.

Designated a Unesco World Heritage site in 2003, the Phong Nha - Ke Bang National Park contains the oldest karst mountains in Asia, formed approximately 400 million years ago.

Its collection of stunning dry caves, terraced caves, towering stalagmites and glistening crystal-edged stalactites represent nature on a very grand scale indeed.

Serious exploration only began in the 1990s, lead by the British Cave Research Association and Hanoi University. Cavers first penetrated deep into Phong Nha Cave, one of the world’s longest systems. In 2005 Paradise Cave was discovered, and in 2009 a team found the world’s largest cave – Son Doong.