According to Nguyen Chau A, tour operator Oxalis general director, the new journey will give step by step difficult levels, including walking, trekking, and crossing streams.

Tourists will have to cross a 500-meter long and 1 meter deep stream and a 15 m high wall in the middle of the Phong Nha-Ke Bang primeval forest.

The tour lasts 2 days – one night with a total distance of 20km.

The Va and Nuoc Nut caves were examined in 2000 by the British Caving Association.