VietNamNet Bridge - Explorers have surveyed Toi cave in the central province of Quang Binh and discovered many fossils hundreds of millions of years old.

The Dark Cave.

Le Thanh Loi, director of the Centre for Phong Nha - Ke Bang Tourism, said after two days of survey the 6km Toi (Dark) Cave, many domestic and foreign explorers have discovered many ancient karst systems.

In particular, the survey team has discovered many fossils hundreds of millions of years old with beautiful stalactite system.

Put into operation in June 2011, the Dark Cave in Phong Nha - Ke Bang is a favourite destination of many tourists.

During the war against America, the cave was used as a bomb shelter.

In 1992, the British Royal Cave Exploration Association conducted surveys and concluded that the cave has a total length of 5.258m, 80m high, with thousands of stalactites of diverse shapes.

The recent survey will help promote cave tourism in Phong Nha.

The Phong Nha - Ke Bang Tourism Center is completing procedures to combine tours connecting three locations: Sinh Ton Valley – Thuy Cung Cave – Dark Cave for two days and one night.

Le Ha