Cave expert and explorer Howard Limbert, tells us more about his fascinating career which has included mapping 300km of caves in Vietnam Howard spends a lot of time in Phong Nha National Park, located in the northwest of Vietnam, close to the border with Laos. It’s home to the planet’s largest deposit of limestone and contains

Hang Son Doong is located deeply in the Phong Nha Ke Bang National Park in the central of Vietnam, which was recognized as the world’s largest cave. Son Doong cave was discovered first by a resident in Quang Binh in 1990. But not until 2009, a new British expedition determined that “ this cave is