The group spent four days wading through hip-high waters before traversing through and camping in soaring ... a sinkhole inside Son Doong. Part of the cave ceiling collapsed, letting sunlight ...

Sinkhole Camp 1, situated within Son Doong Cave, serves as an overnight camping spot for tourists. Photo courtesy of Oxalis Discovered in 1990, Son Doong Cave is the world's largest natural cave ...

Take an otherworldly journey through Hang Son Doong, the world's largest cave located in Vietnam. The cave is more than 500 feet tall, 650 feet wide, and 29,500 feet long. Video courtesy of Ryan ...

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 ...

Situated in Vietnam, the Son Doong Cave is a UNESCO World Heritage site, celebrated for its vast limestone karst formations and lush jungle. Located in central Kentucky, USA, the mammoth cave can ...