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Karst wonders inspire new cave tourism boom_蜘蛛资讯网

home to the Shuanghedong (Twin Rivers) Cave, the longest in Asia at 437.1 km, which attracts scientists from around the world every year. "When I started leading cave expeditions in 2018, there was li

signals drop just 100 meters beyond the entrance, leaving only the sound of rhythmic dripping and the heavy breathing of explorers. After 30 minutes of crawling and climbing along slick rock walls, e

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