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One documented example is Vietnam’s Hang Sơn Đoòng, located in Phong Nha-Kẻ Bàng National Park. Local resident Hồ Khanh encountered its entrance in 1990, and a British-led expedition explored it in 2009. However, there is no verified connection between this cave and the viral photograph. While the image’s origins remain uncertain, it highlights continue reading …
