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 ...

ITOMAN, Japan (AP) — Takamatsu Gushiken turns on a headtorch and enters a cave buried in Okinawa’s jungle. He gently runs his fingers through the gravel until two pieces of bone emerge. These are from ...

Takamatsu Gushiken turns on a headlamp and enters a cave buried in Okinawa's jungle. He gently runs his fingers through the gravel until two pieces of bone emerge. These are from the skulls ...

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 ...

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

(Hiro Komae/AP) ITOMAN, Japan — Takamatsu Gushiken turns on a headtorch and enters a cave buried in Okinawa’s jungle. He gently runs his fingers through the gravel until two pieces of bone emerge.