If we say North Vietnam is a kingdom of karst structures then Phong Nha-Ke Bang National Park no doubt, is the capital.Phong Nha Ke Bang is the only one destination in Vietnam that has been known f...

Why Tu Lan Cave System is special ?The Tu Lan Caves system consists of more than 10 caves, some of which were originally discovered in 1992, and some are found out only in the past few years. Hang ...