Drone Captures Mysterious Cave Deep In Vietnamese Forest, Footage Reveals Forgotten Kingdom.
Hang Son Doong or “River Mountain Cave” was the largest unexplored cave in the world, until now. Filmmaker Ryan Deboodt used his trusty drone to take us on an otherworldly journey through the subterranean wonder. The biggest cavern in Vietnam’s River Mountain Cave is so massive it could accommodate a Boeing 747. The mesmerizing flight takes viewers through the cave’s extensive cavern systems, where the cave walls reach 500 feet floor to ceiling.
The subterranean wonder is so large, it’s been documented to harbor its own weather patterns including clouds, fog and wind currents that drift through the cavernous halls.