Journey Through the Largest Cave in the World | Expedition Raw

We started our two-day journey through the jungle toward the world's largest cave. We're here to photograph this cave in 360-degree images. You know we have to descend into vast empty darkness. I have a cold sensation along my spine, feeling like, how on earth are we gonna be able to capture this place? Just to create one single 360-degree location, we have to take around 400 images. So we're going to take thousands to be able to cover the whole place.

We're walking through a big dark cave. We can see nothing but our headlights, and then we see daylight; that's actually inside the cave. It's an absolutely amazing atmosphere! It's breathtaking and absolutely huge. They named the first doline "watch out for dinosaurs," and that's really the feeling you get when you walk inside that place.

Because you emerge from the darkness of the previous passage into this green landscape inside the cave, you really feel like there could be dinosaurs or some prehistoric creatures living there. What I want to convey is the feeling of being there, about walking through this pristine beautiful place—this cave in Vietnam—and making people realize that places like this are part of our heritage that need to be preserved.

I start exploring this coastline, and that turned out to be the day that I actually discovered the longest sea cave in the world.