Howard Limbert, an expert of the British Royal Caving Research Association (BCRA), has just announced their discovery of another 10. 5 km (6.5 miles) of new caves in Quang Binh province, central Vietnam. 

Nestled deep in the jungles of Phong Nha Ke-Bang National Park, Son Doong Cave in the central province of Quang Binh was being named among seven new wonders of the world, chosen by the New York-based magazine Conde Nast Traveler.