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Son Doong is the world's largest cave, located in the Phong Nha-Ke Bang National Park. It has its own weather system, a lush ecosystem, and massive chambers that could fit entire city blocks.
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It features an extensive network of passages and chambers, and visitors can explore its impressive underground landscapes.
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Famous for its glowworms, the Waitomo Caves in New Zealand are a stunning display of bioluminescence.
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Found in the Naica Mine, the Cave of the Crystals is known for its enormous gypsum crystals, some reaching up to 39 feet (12 meters) in length.
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Located inside the Dachstein Glacier, the Eisriesenwelt Ice Cave is the world's largest ice cave. Visitors can explore its frozen chambers, ice formations, and sculptures created by nature.
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Situated in Guilin, the Reed Flute Cave is famous for its multicolored lighting and stunning rock formations.
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Located on the Isle of Capri, the Blue Grotto is a sea cave known for its vibrant blue and emerald waters. Visitors enter the cave by boat and witness the magical play of light and color.
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Situated in Washington State, Ape Cave is the longest continuous lava tube in the continental United States.
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One of the largest cave systems in Europe, Postojna Cave features a network of passages, chambers, and stunning formations.
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This massive open-air pit cave in the Mexican state of San Luis Potosí is one of the deepest vertical drop caves in the world. It's a popular spot for BASE jumping and birdwatching.