Take an otherworldly journey through Hang Son Doong, the world's largest cave, by both ground and air. Filmed near the entrance and the first and second dolines…
Phong Nha-Ke Bang National Park
Wow! The video came at the perfect time as I'll be heading the Vietnam this week! If only I have 2000 USD lying around somewhere, I would go on the private tour into this cave without hesitation!
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