Hang Son Doong is the world's largest known cave, with enough space in some of its passages to fly a Boeing 747 airplane ...

I continue alone, following the beam of my headlamp along year-old footprints. A jungle inside a cave? A roof collapse long ago in Hang Son Doong let in light; plants thickly followed. As ...

Entering the jungle, Cerè switched his phone off ... hip-high waters before traversing through and camping in soaring caves. At the end of Hang Son Doong stood the Great Wall of Vietnam, a ...

The Extremes crew had trekked for two days through steep valleys covered in lush jungle to reach Hang son Doong cave. Set deep inside Phong Nha-Ke Bang National Park, it is one of dozens of caves ...