Son Doong Cave, Vietnam, 2008
This vast cave in Vietnam’s Phong Nha-Ke Bang National Park was first stumbled upon in 1999, by a farmer named Ho Khanh who took refuge from a storm in its depths. Once the storm had passed, Ho Khanh reported his discovery to the British Caving Research Association (BCRA), who happened to be in Vietnam at the time.
Unfortunately, he couldn’t manage to trace his steps back to the mysterious cavern. Then, almost a decade later, Ho Khanh rediscovered the cave’s entrance while hunting and alerted the BCRA once more.
