The world's largest cave spanning over an incredible five miles long
Hang Son Doong is in Phong Nha-Ke Bang National Park in Vietnam, near the border with Laos and is the world's largest natural ...
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Thailand cave rescue: Elon Musk visits flooded site to lend help with his mini-submarine as five remain trapped
He posted photos of the cave interior and a video showing people working their way through chest-high water. Musk has offered a “kid-sized” submarine, named Wild Boar after the kids ...