"Actually, I learned about this principle before. When the outside and inside form a pressure difference, this swamp, whether it floods the cave entrance or not, still won't flow inside. That's because there's a relatively high pressure inside the cave, creating a vacuum layer over that area."
"So, as long as this function exists, then it might help us get to another underground cave, and this cave is hidden beneath this island?"
"Yes, that's exactly what it means. Since this place can have such a peculiar swamp, I think when people hid here, someone must have discovered this long ago. So, they took advantage of it, hiding people under this cave, and just like that, for decades, probably no one would ever find out."
"If that's the case, it is indeed a great hiding place, but I'm not sure if this situation can actually become a reality?"
